Hello,

See there is no such mandatory requirement of visiting study centre for number of times, once you secure admission in IGNOU, you may or may not choose to attend classes which are usually held in weekends(at least prior to the pandemic it was so, you should check with the coordinator of your study centre to know the exact details regarding this), if it's possible then do attend the classes, it will benefit you, you can clear your doubts with the faculty, other than this if assignment submission is done at study centre you have to visit the same, and at the time of term end examination, because of covid assignment submission was done online, hence depending upon the situation your concerned RC that is regional centre will take the decision accordingly.