Late Night Coding

What are commit messages like after normal working hours? Using every public Github commit message from November 2015, I'll dive into this question with a simple natural language processing script!

After regexing only alphanumerics, removing stopwords, lemmatizing and binning unigrams into daytime (9am to 9pm) and nighttime buckets, I found the more common daytime(/nighttime) words by subtracting nighttime(daytime) word frequencies from daytime(nighttime) word frequencies. The word clouds below highlight these most common commit words: