man and wife vs wife

man and wife

noun
  • An opposite-sex married couple. 

wife

noun
  • A married woman, especially in relation to her spouse. 

  • The female of a pair of mated animals. 

  • Synonym of woman. 

verb
  • to marry (a woman) 

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