grocery vs superette

grocery

noun
  • A shop or store that sells groceries; a grocery store. 

  • retail foodstuffs and other household supplies. 

verb
  • To go grocery shopping. 

  • To furnish with groceries. 

superette

noun
  • A convenience store. 

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