You can use the standard campaign to post 100 times in one day, just only add 100 items. If you want to post 100 things on 1 account 2 days in a row, just add 200 posts and set it to publish only 100 times a day.
If you want, you can "clone" the campaign daily and use it daily. If you want to publish 100 things, on 1 account for 1 day only, this is the way to go. Ig you want to post 100 things on 100 accounts daily, you can use "volume". If you use a scheduled campaign, you can set it to post 100 things at very specific times.
What am I missing in your question?