shirk vs welcher

shirk

noun
  • One who shirks, who avoids a duty or responsibility. 

  • The unforgivable sin of idolatry. 

verb
  • To avoid, especially a duty, responsibility, etc.; to stay away from. 

  • To evade an obligation; to avoid the performance of duty, as by running away. 

  • To procure by petty fraud and trickery; to obtain by mean solicitation. 

welcher

noun
  • One who welches. 

  • A Welshman or person of Welsh descent. 

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