accustomed vs frequent

accustomed

adj
  • Familiar through use; usual; customary. 

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

frequent

adj
  • Done or occurring often; common. 

  • Occurring at short intervals. 

  • Addicted to any course of conduct; inclined to indulge in any practice; habitual; persistent. 

verb
  • To visit often. 

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