battle axe vs battleaxe

battle axe

noun
  • An ancient military weapon, an axe designed for combat, including (in heraldry) when borne on arms as a mark of prowess. 

  • A domineering, antagonistic woman. 

  • An allotment of land at the rear of another property, with a long, narrow strip of land connecting it to the roadway. 

  • An electric guitar. 

battleaxe

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