keyword vs writing

keyword

noun
  • Any important word in a text or document, which may be linked to other words or other information, or at least merely listed in the metadata for searches to find. 

  • A reserved word used to identify a specific command, function, etc. 

  • Any word used as the key to a code. 

  • Any word that occurs in a text more often than normal. 

  • Any word used in a reference work to link to other words or other information. 

verb
  • To tag with keywords, as for example to facilitate searching. 

writing

noun
  • Something written, such as a document, article or book. 

  • The process of representing a language with symbols or letters. 

  • The style of writing of a person. 

  • Intended for or used in writing. 

  • Graphism of symbols such as letters that express some meaning. 

  • A work of an author. 

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