maul vs zerg

maul

noun
  • A situation where the player carrying the ball, who must be on his feet, is held by one or more opponents, and one or more of the ball carrier's team mates bind onto the ball carrier. 

  • A heavy long-handled hammer, used for splitting logs by driving a wedge into them, or in combat. 

verb
  • To beat with a maul. 

  • To criticise harshly. 

  • To handle someone or something in a rough way. 

  • To savage; to cause serious physical wounds (usually used of an animal). 

zerg

noun
  • A very large group of units or players. 

verb
  • To attack an opponent with a large swarm of units before they have been able to build sufficient defences. 

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