background vs habitat

background

noun
  • A less important feature of scenery (as opposed to foreground). 

  • One's social heritage, or previous life; what one did in the past. 

  • Information relevant to the current situation about past events; history. 

  • The image or color over which a computer's desktop items are shown (e.g. icons or application windows). 

  • A part of the picture that depicts scenery to the rear or behind the main subject; context. 

  • A type of activity on a computer that is not normally visible to the user. 

verb
  • To put in a position that is not prominent. 

  • To gather and provide background information (on). 

adj
  • Less important or less noticeable in a scene or system. 

habitat

noun
  • A terrestrial or aquatic area distinguished by geographic, abiotic and biotic features, whether entirely natural or semi-natural. 

  • Conditions suitable for an organism or population of organisms to live. 

  • A place in which a person lives. 

  • A place or type of site where an organism or population naturally occurs. 

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