accession vs boost

accession

noun
  • The act of coming to or reaching a throne, an office, or dignity. 

  • A mode of acquiring property, by which the owner of a corporeal substance which receives an addition by growth, or by labor, has a right to the part or thing added, or the improvement (provided the thing is not changed into a different species). 

  • A coming to; the act of acceding and becoming joined. 

  • The invasion, approach, or commencement of a disease; a fit or paroxysm. 

  • Access; admittance. 

  • A group of plants of the same species collected at a single location, often held in genebanks. 

  • Complicity, concurrence or assent in some action. 

  • Agreement. 

  • The act by which one power becomes party to engagements already in force between other powers. 

  • Increase by something added; that which is added; augmentation from without. 

verb
  • To make a record of (additions to a collection). 

boost

noun
  • Something that helps, or adds power or effectiveness; assistance. 

  • A positive intake manifold pressure in cars with turbochargers or superchargers. 

  • A coordinate transformation that changes velocity. 

  • A push from behind, as to one who is endeavoring to climb. 

verb
  • To lift or push from behind (one who is endeavoring to climb); to push up. 

  • To steal. 

  • To give a booster shot to. 

  • To help or encourage (something) to increase or improve; to assist in overcoming obstacles. 

  • To amplify; to signal boost. 

  • To jump-start a vehicle by using cables to connect the battery in a running vehicle to the battery in a vehicle that won't start. 

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