What is the origin of the idiom "fever pitch" and when to use it?

The idiom "fever pitch" originated in the realm of sports, specifically in reference to the game of cricket. It was first used in the mid-19th century in England to describe the state of excitement and intense enthusiasm among spectators during a cricket match. The phrase is used in various contexts and occasions to describe situations of intense excitement, fervor, or agitation. It is commonly employed when referring to sports events, such as a championship match or a highly anticipated game, where the atmosphere is charged with enthusiastic fans, high emotions, and a sense of intense competition.