convenience vs prep

convenience

verb
  • To make convenient 

noun
  • Any object that makes life more convenient; a helpful item. 

  • The quality of being convenient. 

  • A convenient time. 

prep

verb
  • To prepare. 

noun
  • A student or graduate of a prep school, a preppy. 

  • A prep school. 

  • preparatory level; the last two levels or the fourth and fifth years of preschool; the two levels before first grade. 

  • Preparation. 

  • Homework, work set to do outside class time, used widely in public schools and preparatory schools but not state schools. 

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