Looks like the bot keeps doing a few files and stalling - some days only run 2 minutes - often less than 5 minutes, although on 27th it did 47 min. Still plenty to reduce. Maybe when it skips an unsuitable file it drops out rather than skipping? Left you an earlier note at https://en.wikipedia.org/wiki/User_talk:Theopolisme#Theo.27s_Little_Bot