I have been doing research with the same professor for almost 2 years. At certain times (during summer, during year off) I was working 25 hrs/ week but at other times (school year) I was working about 5 hrs/week. What would I state for hours/week? Should I average the hours out? Also, when people say that they have been research for 2 years with 20hrs/week, I find that kind of hard to believe because there will be times when you are taking breaks in between.