kiss vs osculation

kiss

verb
  • To touch with the lips or press the lips against, usually to show love or affection or passion, or as part of a greeting. 

  • To (cause to) touch lightly or slightly; to come into contact. 

  • Of two or more people, to touch each other's lips together, usually to express love or affection or passion. 

noun
  • A low-speed mid-air collision between the envelopes of two hot air balloons, generally causing no damage or injury. 

  • A touch with the lips, usually to express love or affection, or as a greeting. 

  • An 'X' mark placed at the end of a letter or other type of message, signifying the bestowal of a kiss from the sender to the receiver. 

  • The alignment of two bodies in the solar system such that they have the same longitude when seen from Earth, conjunction. 

  • A type of filled chocolate candy, shaped as if someone had kissed the top. See Hershey's Kisses. 

osculation

noun
  • A close contact. 

  • Determining whether a number is divisible by another by means of certain operations on its digits. 

  • The action of kissing. 

  • A contact between curves or surfaces, at which point they have a common tangent. 

  • A kiss. 

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