pommel vs pummel

pommel

verb
  • To pound or beat. 

noun
  • Either of the rounded handles on a pommel horse. 

  • The knob on the hilt of an edged weapon such as a sword or dagger. 

  • The upper front brow of a saddle. 

  • A knob forming the finial of a turret or pavilion. 

pummel

verb
  • To hit or strike heavily and repeatedly. 

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