boulder vs gem

boulder

noun
  • A large mass of stone detached from the surrounding land. 

  • A particle greater than 256 mm in diameter, following the Wentworth scale 

  • A large marble, in children's games. 

  • A session of bouldering; involvement in bouldering. 

verb
  • To engage in bouldering. 

gem

noun
  • A precious stone, usually of substantial monetary value or prized for its beauty or shine. 

  • A type of geometrid moth, Orthonama obstipata. 

  • Any precious or highly valued thing or person. 

  • Anything of small size, or expressed within brief limits, which is regarded as a gem on account of its beauty or value, such as a small picture, a verse of poetry, or an epigram. 

  • A package containing programs or libraries for the Ruby programming language. 

verb
  • To adorn with, or as if with, gems. 

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