too often, in a way that is annoying► keep (on) doing something especially spoken to do something many times, in a way that is annoying: · Dad, Bobby keeps hitting me!· How can I explain if you keep on interrupting me?· I keep forgetting to mail this letter.
► always/all the time if someone or something is always doing something, or someone or something does something all the time , it annoys you because they do it too often: · I'm sick of Harold, he's always telling me what to do.· What do you mean you never see me? You're at my house all the time.· I don't know about you, but I'm always having arguments with people!· He was always trying to persuade me to go out drinking with him.
► constantly/continually use this when you are very annoyed because something happens repeatedly over a long period of time: · They seemed to be continually arguing.· I wish you'd clean up your room without having to be constantly reminded.
► be forever doing something spoken if someone or something is forever doing something, they annoy you by doing it very often over a long period of time: · He never does his homework on time and is forever getting into trouble at school.· We bought a new washing machine. The old one was forever breaking down.
► half the time spoken say this when you are describing something annoying or bad that someone does very often: · Half the time the managers don't know what's going on.· I never know where he is - half the time he doesn't return my phone calls.
► time and time again use this to say that something has been done many times, especially when this is annoying or does not have any effect: · I've told you time and time again not to play with matches - it's dangerous.· I see people making the same mistakes, time and time again.
► with great regularity if something happens with great regularity , it keeps happening, often in an annoying way: · Yes, the bank keep piling these outrageous charges on my bank account with great regularity.· With great regularity, wasps would fly in through the open window and get trapped behind the glass.
► ad nauseam if someone talks about something ad nauseam , they talk about it for so long that it becomes very annoying or boring: · We've discussed this ad nauseam, and I don't see the point of going over the same ground again.· He goes on ad nauseam about how much better everything was in the old days.
if you say or do something ad nauseam, you say or do it so often that it becomes annoying for other people: 
Look, we’ve been over this ad nauseam. I think we should move on to the next item.