Ho shin sul stands for self defence but is really the grappling content of TaeKwonDo.
In my ITF Chang Hon TaeKwonDo dojang we had Ho Shin Sul once a month for 10-15 minutes. This consisted of various clockwise and counter clockwise joint manipulations. Hip throws were not taught but are part of it and can be integrated for the grading session. I believe Ho Shin Sul gradings start for black belt tests in ITF. I don't recall doing them for my red belt test. It is not performed against resistance.
In my ITF Chang Hon TaeKwonDo dojang we had Ho Shin Sul once a month for 10-15 minutes. This consisted of various clockwise and counter clockwise joint manipulations. Hip throws were not taught but are part of it and can be integrated for the grading session. I believe Ho Shin Sul gradings start for black belt tests in ITF. I don't recall doing them for my red belt test. It is not performed against resistance.