clarification vs pointer

clarification

noun
  • The act of freeing from obscurities. 

  • The act of clarifying; the act or process of making clear or transparent by freeing visible impurities; particularly, the clearing or fining of liquid substances from feculent matter by the separation of the insoluble particles which prevent the liquid from being transparent. 

pointer

noun
  • Something that gives a point (sharp end) to something. 

  • Anything that points or is used for pointing. 

  • A variable that holds the address of a memory location where a value can be stored. 

  • A teacher's pointer, pointing stick, a rod with an arrow. 

  • A needle-like component of a timepiece or measuring device that indicates the time or the current reading of the device. 

  • A breed of hunting dog, trained to point out game. 

  • A tip, a bit of advice. 

  • An icon that indicates the position of the pointing device, such as a mouse. 

  • Something worth a given number of points. 

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