Has hour segment
From WikiApiary, monitoring the MediaWiki universe
Has hour segment is a number defined by taking the PAGEID and using the modulo of 24. The value is set in Template:Website. There are certain functions that we want to perform on all websites in WikiApiary but we want to spread it out for each hour. This property allows you to select 1/24th of the websites each hour and perform a task.
Combining Has hour segment with Has day segment allows a bot to run smoothly over 1/168th of the websites each hour of the week.