raik vs trek

raik

verb
  • To walk; to roam, to wander. 

  • To roam or wander through (somewhere). 

  • Of animals (especially sheep): to graze. 

noun
  • A walk, or a journey taken (especially on foot); the act of taking a walk or journey. 

  • The pastureland over which animals graze; a range, a stray. 

  • The movement of animals while grazing. 

  • A journey to transport something between two places; a run; also, the quantity of items so transported. 

trek

verb
  • To travel by walking. 

  • To travel by ox wagon. 

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

  • To make a slow or arduous journey. 

noun
  • A journey by ox wagon. 

  • The Boer migration of 1835-1837. 

  • A long walk. 

  • A slow or difficult journey. 

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