higher vs upthrust

higher

verb
  • To ascend. 

  • To make higher; to raise or increase in amount or quantity. 

noun
  • A national school-leaving examination and university entrance qualification. 

upthrust

verb
  • To be thrust upwards. 

  • To thrust something upwards. 

noun
  • Buoyancy. 

  • An upward movement of part of the Earth's crust. 

  • An upward thrust. 

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