everyday vs monotonous

everyday

adj
  • commonplace, ordinary 

  • appropriate for ordinary use, rather than for special occasions 

noun
  • the ordinary or routine day or occasion 

monotonous

adj
  • Tedious, repetitious, or lacking in variety. 

  • Having an unvarying pitch or tone. 

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