aenhancers

Hi all! This might be easy, but I couldn´t do it. I´m typing a text using the typewriter animation preset, but I´d like the typing to vary in speed. I have tried various sinuses and wiggles, but when their values drop faster than the speed of the typing, the total value typed is decreasing and the text starts to get erased. Then when the sinus increases again, the text continues, but I need it to always type and never to erase letters.

I could do this with a time remap, but I´d like to solve it with an expression.

Any ideas?

Thanks!