Tweets may be regulated through various apps. Sometimes I load 50 tweets and set them to be posted every 20 minutes. Then I'm done for the day. Takes maybe 10 minutes. Helpful to already have the tweet content.
I hate that when people tweet one after another after another.... spammy. I look at the timeline and there is nothing but one tweet after another from the same person. Maybe you could make it every 60 minutes :)