seek vs undertake

seek

verb
  • To try to acquire or gain; to strive after; to aim at. 

  • To try to find; to look for; to search for. 

  • To try to reach or come to; to go to; to resort to. 

  • To navigate through a stream. 

  • To ask for; to solicit; to beseech. 

  • To attempt, endeavour, try 

noun
  • The operation of navigating through a stream. 

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 seek and undertake occurred in a corpus of books? (source: Google Ngram Viewer )