current vs thermal

current

adj
  • Electric; of or relating to electricity. 

  • Generally accepted, used, practiced, or prevalent at the moment. 

  • Existing or occurring at the moment. 

noun
  • a tendency or a course of events 

  • The generally unidirectional movement of a gas or fluid. 

  • the amount of electric charge flowing in each unit of time. 

  • The part of a fluid that moves continuously in a certain direction, especially (oceanography) short for ocean current. 

thermal

adj
  • Pertaining to heat or temperature. 

  • Caused or brought about by heat. 

  • Having a rough finish by treatment with a blow-torch. 

  • Providing efficient insulation so as to keep the body warm. 

verb
  • To create a rough finish on stone by treating it with a high-temperature blow-torch. 

  • To fly an unpowered aircraft in a (thermal) column of rising air. 

noun
  • A column of rising air in the lower atmosphere created by uneven heating of Earth's surface. 

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