fun vs monotonous

fun

verb
  • To tease, kid, poke fun at, make fun of. 

noun
  • playful, often noisy, activity. 

  • amusement, enjoyment or pleasure 

adj
  • Enjoyable or amusing. 

  • Whimsical or flamboyant. 

monotonous

adj
  • Having an unvarying pitch or tone. 

  • Tedious, repetitious, or lacking in variety. 

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