quest vs trek

quest

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. 

verb
  • To locate and attach to a host animal. 

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

  • To search for something; to seek. 

trek

noun
  • A slow or difficult journey. 

  • A journey by ox wagon. 

  • The Boer migration of 1835-1837. 

  • A long walk. 

verb
  • To travel by ox wagon. 

  • To travel by walking. 

  • To journey on foot, especially to hike through mountainous areas. 

  • To make a slow or arduous journey. 

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