caring vs spring fever

caring

noun

  • The act of one who cares. 

adj

  • Kind, sensitive, or empathetic. 

spring fever

noun

  • A feeling of invigoration and restlessness associated with the arrival of the warm weather and renewal of nature in the spring season. 

  • A feeling of laziness or listlessness associated with the arrival of the warm, comfortable weather of the spring season. 

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