favor vs lifeguard

favor

noun
  • The object of regard; person or thing favoured. 

  • A small gift; a party favor. 

  • Mildness or mitigation of punishment; lenity. 

  • A kind or helpful deed; an instance of voluntarily assisting (someone). 

  • Partiality; bias 

  • Goodwill; benevolent regard. 

verb
  • To resemble; especially, to look like (another person). 

  • To do a favor [noun sense 1] for; to show beneficence toward. 

  • To look upon fondly; to prefer. 

  • To use more often. 

  • To encourage, conduce to 

  • To treat with care. 

lifeguard

noun
  • A bodyguard or unit of bodyguards, a guard of someone's (especially a king's) life or person. 

  • An attendant, usually an expert swimmer, employed to save swimmers in trouble or near drowning at a body of water. 

  • A lifesaver. 

  • A sturdy metal bracket fixed in front of each of the leading wheels of a train to deflect small objects away from the wheels to prevent derailment. 

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