ad nauseam vs bis

ad nauseam

adv
  • Having been done or repeated so often that it has become annoying or tiresome. 

  • To a nauseating or sickening degree. 

bis

adv
  • Twice; showing that something is, or is to be, repeated, such as a passage of music, or an item in accounts. 

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