dine out vs supper

dine out

verb
  • To have dinner away from one's house, usually at a restaurant. 

supper

verb
  • To eat dinner (see above). 

  • To consume a snack before retiring. 

noun
  • A meal from a chip shop consisting of a deep-fried food with chips. 

  • Food consumed before going to bed. 

  • A drinker, especially one who drinks slowly (i.e., one who sups). 

  • Any meal eaten in the evening; dinner eaten in the evening, rather than at noon. 

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