quest vs undertake

quest

verb
  • To seek or pursue a goal; to undertake a mission or job. 

  • To locate and attach to a host animal. 

  • To search for something; to seek. 

noun
  • A short test. 

  • A journey or effort in pursuit of a goal (often lengthy, ambitious, or fervent); a mission. 

  • The act of seeking, or looking after anything; attempt to find or obtain; search; pursuit. 

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