centering vs direction

centering

noun
  • The process of moving something to a centre, normally before some other process. 

  • A type of formwork which serves as a temporary structure during the construction of arches and bridges. 

direction

noun
  • A theoretical line (physically or mentally) followed from a point of origin or towards a destination. May be relative (e.g. up, left, outbound, dorsal), geographical (e.g. north), rotational (e.g. clockwise), or with respect to an object or location (e.g. toward Boston). 

  • Guidance, instruction. 

  • A general trend for future action. 

  • The work of the director in cinema or theater; the skill of directing a film, play etc. 

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