packed lunch vs whet

packed lunch

noun
  • A picnic meal, sandwiches or anything packed and intended to be eaten away from home. 

whet

noun
  • That which whets or sharpens; especially, an appetizer. 

  • The act of whetting something. 

verb
  • To hone or rub on with some substance, as a piece of stone, for the purpose of sharpening – see whetstone. 

  • To stimulate or make more keen. 

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