ready vs undertake

ready

verb
  • To prepare; to make ready for action. 

noun
  • ready money; cash 

adj
  • Not slow or hesitating; quick in action or perception of any kind. 

  • Prepared for immediate action or use. 

  • Offering itself at once; at hand; opportune; convenient. 

  • Inclined; apt to happen. 

  • Liable at any moment. 

undertake

verb
  • To take upon oneself; to start, to embark on (a specific task etc.). 

  • To commit oneself (to an obligation, activity etc.). 

  • To pass a slower moving vehicle on the curbside rather than on the side closest to oncoming traffic. 

noun
  • The passing of slower traffic on the curbside rather than on the side closest to oncoming traffic. 

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