nod vs salute

nod

noun
  • An instance of inclining the head up and down, as to indicate agreement, or as a cursory greeting. 

  • A nomination. 

  • Approval. 

  • A reference or allusion to something. 

verb
  • To signify by a nod. 

  • To incline the head up and down, as to indicate agreement. 

  • To allude to something. 

  • To sway, move up and down. 

  • To make a mistake by being temporarily inattentive or tired 

  • To briefly incline the head downwards as a cursory greeting. 

  • To fall asleep while under the influence of opiates. 

  • To gradually fall asleep. 

  • To head; to strike the ball with one's head. 

salute

noun
  • An utterance or gesture expressing greeting or honor towards someone, now especially a formal, non-verbal gesture made with the arms or hands in any of various specific positions. 

  • A discharge of cannon or similar arms, as a mark of honour or respect. 

  • A kiss, offered in salutation. 

  • A pyrotechnic device primarily designed to produce a loud bang. 

verb
  • To act in thanks, honor, or tribute; to thank or extend gratitude; to praise. 

  • To make a gesture in honor of (someone or something). 

  • to wave, to acknowledge an acquaintance. 

  • To address, as with expressions of kind wishes and courtesy; to greet; to hail. 

  • To promote the welfare and safety of; to benefit; to gratify. 

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