hug vs kiss

hug

noun
  • A close embrace, especially when charged with such an emotion as represented by: affection, joy, relief, lust, anger, aggression, compassion, and the like, as opposed to being characterized by formality, equivocation or ambivalence (a half-embrace or "little hug"). 

  • A particular grip in wrestling. 

verb
  • To stay close to (the shore etc.) 

  • To cling closely together. 

  • To hold fast; to cling to; to cherish. 

  • To embrace by holding closely, especially in the arms. 

kiss

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

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

  • 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. 

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. 

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