graduation vs services

graduation

noun
  • The action or process of graduating and receiving a diploma for completing a course of study (such as from an educational institution). 

  • A commencement ceremony. 

  • The action or process of graduating (leaving a group). 

  • The exposure of a liquid in large surfaces to the air, so as to hasten its evaporation. 

  • A marking (e.g., on a container) indicating a measurement on a scale, usually one of many such markings. 

services

noun
  • That which is produced, then traded, bought or sold, then finally consumed and consists of an action or work. 

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