Just do random amounts of "can be arsed" spinkle in with "can't be arsed" lol to be as random as possible through the week, i don't think but only the most hardcore people visit pinterst each day, start of like a noob and act like a noob, once i added 60 pins to a board in an hour, then didn't add anything for 1 month + lol so it depends on what you find to post that is intersting and new in your content pipeline too. Just try to ahve the best boards. Don't spam them with rubbish, and get banned is the moto of everywhere.