competence vs concurrency

competence

noun
  • The quality or state of being able or suitable for a particular task; the quality or state of being competent for a particular task or skill. 

  • The quality or state of being competent, i.e. able or suitable for a general role. 

  • The system of linguistic knowledge possessed by native speakers of a language, as opposed to its actual use in concrete situations (performance), cf. linguistic competence. 

  • the legal authority to deal with a matter. 

  • The degree to which a rock is resistant to deformation or flow. 

concurrency

noun
  • The property or an instance of being concurrent; something that happens at the same time as something else. 

  • A property of systems where several processes execute at the same time. 

  • A stretch of road that is shared between two or more numbered or named routes. 

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