fusion vs heavy metal

fusion

noun
  • A style of music that blends disparate genres; especially different types of jazz and reggae. 

  • The act of melting or liquefying something by heating it. 

  • The result of the hybridation of two genes which originally coded for separate proteins. 

  • The act of two characters merging into one, typically more powerful, being; or the merged being itself. 

  • The process by which two distinct lipid bilayers merge their hydrophobic core, resulting in one interconnected structure. 

  • A style of cooking that combines ingredients and techniques from different countries or cultures 

  • A nuclear reaction in which nuclei combine to form more massive nuclei with the concomitant release of energy. 

verb
  • to combine; to fuse 

heavy metal

noun
  • A genre descended from rock music, characterized by massive sound, highly amplified distortion, and overall loudness, often with extended guitar solos, and lyrics that involve aggressive or fantastic imagery. 

  • Any metal that has a specific gravity greater than about 5, especially one, such as lead, that is poisonous and may be a hazard in the environment. (There are many different definitions of what counts as a heavy metal; see Heavy metals for a discussion.) 

  • Great influence or power. 

  • guns or shot of large size. 

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