стоял крепкий мороз("I seated myself in his armchair and warmed my hands before his crackling fire, for a sharp frost had set in, and the windows were thick with the ice crystals." – Sir Arthur Conan DoyleART Vancouver)
резкий рост числа(чего-л. • There has been a sharp rise in the number of accidents on this stretch of Hwy 17 after the road improvements were completed.ART Vancouver)