Can a parole officer continously come by the home if parole person has not violated any laws and meets officer as requested?

My husband is on 3 years paper he served 7 federal. He has completed 2 years paper they gave him a new probation officer and he has been constantly coming by he did fail 1 drug test the entire time so he put him in drug class. My husband has maintained full time work with overtime and can't enroll in school because of the class.