accustomed vs run-of-the-mill

accustomed

adj

  • Familiar through use; usual; customary. 

  • Familiar with something through repeated experience; adapted to existing conditions. 

run-of-the-mill

adj

  • Ordinary; not special. 

How often have the words accustomed and run-of-the-mill occurred in a corpus of books? (source: Google Ngram Viewer )