background vs descent

background

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

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

  • 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. 

descent

noun
  • A sloping passage or incline. 

  • A particular extension of the idea of gluing. 

  • A falling upon or invasion. 

  • A drop to a lower status or condition; decline. 

  • Lineage or hereditary derivation. 

  • An instance of descending; act of coming down. 

  • A way down. 

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