adjunctive vs top-up

adjunctive

noun
  • a substance added as a supplement; often in the phrase "additives and adjunctives." 

  • a connector joining two components of the same weight, such as a coordinating conjunction 

adj
  • forming an adjunct 

  • additional; neither basic nor primary 

  • the property of two operations x and y, such that ax(ayb) = a, and ay(axb) = a 

top-up

noun
  • An addition. 

  • The situation where a student who holds a qualification equivalent to part of a degree course is then accepted onto a degree course at an intermediate point, without having to start it from the beginning. 

  • Additional credit purchased for a mobile phone. 

  • An additional premium paid over the initial premium in order to increase benefit values. 

  • A serving of drink used to top up an existing glass. 

  • A dose of epidural anesthetic added to previously injected spinal anesthetic in combined spinal-epidural anesthesia 

adj
  • That serves as an addition 

How often have the words adjunctive and top-up occurred in a corpus of books? (source: Google Ngram Viewer )