I am talking in a user-user match up here. Obviously the playbook you use will affect your answer but I would still like to see a general answer. For me personally I use two different terms in my 3-4 book. I have "pressures" and I have "blitzes". A pressure to me is sending 4-5 guys after the offense. A blitz is where I get unsound and leave the secondary guys on rubber dinghies. I typically pressure on every down, and will blitz 3 times per 10 plays.