accession vs increase

accession

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

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

  • 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. 

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

increase

noun
  • An amount by which a quantity is increased. 

  • The creation of one or more new stitches; see Increase (knitting). 

  • For a quantity, the act or process of becoming larger 

  • Offspring, progeny 

verb
  • To multiply by the production of young; to be fertile, fruitful, or prolific. 

  • To become more nearly full; to show more of the surface; to wax. 

  • To make (a quantity, etc.) larger. 

  • (of a quantity, etc.) To become larger or greater. 

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