encounter vs puzzle

encounter

verb
  • To meet (someone) or find (something), especially unexpectedly. 

  • To execute someone extrajudicially. 

  • To confront (someone or something) face to face. 

  • To engage in conflict, as with an enemy. 

noun
  • A sexual encounter; sexual activity, especially unplanned or unexpected, between people not in a sexual relationship, that usually does not lead to the establishment of a relationship, and may or may not happen again. A sexual encounter could be consensual or non-consensual; in the latter case, it is a sexual assault. A consensual sexual encounter that happens only once is commonly known as a one-night stand. 

  • A hostile, often violent meeting; a confrontation, skirmish, or clash, as between combatants. 

  • A meeting, especially one that is unplanned or unexpected. 

  • A match between two opposing sides. 

  • An extrajudicial killing or execution. 

puzzle

verb
  • To perplex, confuse, or mystify; to cause (someone) to be faced with a mystery, without answers or an explanation. 

  • To think long and carefully, in bewilderment. 

  • To make intricate; to entangle. 

noun
  • Anything that is difficult to understand or make sense of. 

  • A riddle. 

  • The state of being puzzled; perplexity. 

  • A game for one or more people that is more or less difficult to work out or complete. 

  • A jigsaw puzzle. 

  • A crossword puzzle. 

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