One of the constructions English learners learn quite early is “someone used to do something”. It expresses that someone did something regularly long time ago but doesn’t do it anymore in the present. For example:
[I played the violin when I was younger, but I don't do that anymore.]
Learners often incorrectly infer that this is just the past tense of “I use to do”, which should logically mean “I regularly do”. However, such a phrase doesn’t exist. Native speakers never say “I use to do something”, however logical it may sound: