I'm still not 100% with this answer but this is what I've got:
Research into time effect on illusion is sparce, but from what i have found I think it depends on the type of illusion. I found a paper by McCauley and Henrich which discusses the way in which illusions are processed - diachronic being over time and synchronic being instantly. They have used Müller-Lyer illusion as an example.
Diachronic penetration contrasts with the synchronic penetration of
those input systems. Because subjects either (a) acquire some explicit
theory (that has implications for their demonstratively illusory
experience with some stimulus),6 or (b) gain wider perceptual
experience including, possibly, wider experience with the
illusion-inducing stimulus and, presumably, thereby obtain a new
implicit conception of it,7 or (c) both, they would, in the case of
synchronic penetration, instantly or at least very quickly cease to
experience the illusion or, at any rate, experience a mitigated
version of the illusion—e.g., the perceived disparity between the
lines in the Müller-Lyer illusion (below) would measurably decrease.
the Müller-Lyer illusion is a persistent illusion, Fodor (1983) also cites the Ames room and the phi phenomenom (perceiving a series of still images, when viewed in rapid succession, as continuous motion) as persistent illusions. It appears that the simultaneous contrast illusion is a persistent illusions.
The simultaneous contrast illusion is induced by the distribution of the peripheral gray values which indeed show a continuous shift of gray levels, although in a reverse direction. The phenomenon of simultaneous contrast helps us to make the contrast clearer; helping us to identify figure-ground relations more easily, more quickly and more securely (Carbon, 2014). Visual processing is very fast, it generally starts at about 75-80 ms (Vanrullen & Thorpe, 2001).
There are some illusions that once they are 'figured out' wont work again (such as change blindness).
Some illuisons require sematic knowledge to fill in the gaps for example the illusion below.
What we will perceive at first glance is mainly guided through the
specific activation of our semantic network. If we have been exposed
to a picture of a man before, or if we think of a man or have heard
the word “man”, the chance is strongly increased that our perceptual
system interprets the ambiguous pattern towards a depiction of a
man—if the prior experiences were more associated with a rat, a mouse
or another animal of such a kind, we will, in contrast, tend to
interpret the ambiguous pattern more as a rat (Carbon, 2014).
At first glance you perceive the illusion as one thing but you may go onto to perceive both things. This would require more time - and this would be the illusion changing over time.
What I've concluded about the simultaneous contrast illusion and others like it is that perception of them is two things - fast and persistant. What I've drawn from this is that they don't change over time, and that not many researchers are interested in whether or not they change over time, possibly due to coming to the same conclusion?
References:
McCauley, R. N., & Henrich, J. (2006). Susceptibility to the Müller-Lyer illusion, theory-neutral observation, and the diachronic penetrability of the visual input system. Philosophical Psychology, 19(1), 79-101.
Carbon, C. C. (2014). Understanding human perception by human-made illusions. Frontiers in human neuroscience, 8, 566.
Vanrullen, R., & Thorpe, S. J. (2001). The time course of visual processing: from early perception to decision-making. Journal of cognitive neuroscience, 13(4), 454-461.
