resupply vs stock up

resupply

verb
  • To stock up on supplies again. 

  • To supply again. 

noun
  • The act of supplying again. 

  • A package of materials used to replenish supplies. 

stock up

verb
  • To acquire or increase stock or inventory. 

  • To swell up (usually refers to edema in a leg). 

  • To extirpate; to dig up. 

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