EDGE vs rudiment

EDGE

noun
  • Explain, demonstrate, guide, enable; an educating method. 

  • Notation for an edge rusher. 

rudiment

noun
  • A fundamental principle or skill, especially in a field of learning. 

  • A body part that no longer has a function 

  • A form that lacks full or complex development. 

  • In percussion, one of a selection of basic drum patterns learned as an exercise. 

verb
  • To ground; to settle in first principles. 

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