连日连夜

Explanation: Means around the clock 　　Usage: Joint type; as adverbial; means around the clock 　　Source: Qing Cao Xueqin's "Dream of Red Mansions" at 117 back: "Now, suddenly became a TB, and now critical, overnight courier days a person came." 　　Examples: Lee big blacksmith stove - Health and the red fire, he was busy giving the repair plow, hoe to play. ★ Zhou Libo, "Storm" Part II Thesaurus:  Day after day Following the night, night and day, day and night