basement vs root cellar

basement

noun
  • A floor of a building below ground level. 

  • Last place in a sports conference standings. 

  • A mass of igneous or metamorphic rock forming the foundation over which a platform of sedimentary rocks is laid. 

root cellar

noun
  • A structure built underground or partially underground and used to store vegetables, fruits, and nuts or other foods. 

verb
  • To cellar (food) in a root cellar. 

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