passé vs used-to-be

passé

adj
  • Past one's prime; worn; faded. 

  • Dated; out of style; old-fashioned. 

noun
  • An attack that passes the target without hitting. 

used-to-be

adj
  • Former, ex-. 

How often have the words passé and used-to-be occurred in a corpus of books? (source: Google Ngram Viewer )