English Idioms - Intermediate Unit 32 – Time 2 – Clocks and Frequency • If you do something against the clock, you do it as fast as possible and try to finish it before a certain time. • Almost instantly, immediately, as in The train will be here in no time at all , or he'll be finished in less than no time • The idiom "not have a minute to call one's own" is believed to have originated in the late 19th century. This phrase is used to describe a situation where someone is extremely busy or has a lot of responsibilities, leaving them with no free time to relax or don’t have a minute to myself • Very early morning, daybreak. For example, I got up at the crack of dawn . The crack in this term alludes either to the suddenness of sunrise or to the small wedge of light appearing as the sun rises over the horizon. • Extremely rare, especially as an opportunity. For example, An offer like that will come just once in a lifetime . now and for the last time; finally. • intermittently. • "it rained on and off most of the afternoon" on nearly every occasion. Running smoothly, working very well.