常年累月

Explanation: Over many years, described a long time after 　　Usage: Joint type; as object, attribute; described a long time 　　Source: Gao Yun Lan "Small Town Spring" Chapter: "Fujian China put the years clamor Binghuo, disaster officials, kidnapping, gang fights." Thesaurus:  many a little makes a mickle, Many a little makes a mickle., Tired old plot on, accumulate over a long period, With the passing of time In Deep, for years on end, Poor years, generation after generation, a thousand-li journey begins with the first step--the highest eminence is to be gained step by step Antonym Group:  at a brush triumph, read ten lines at a glance, conspectus to have learned a passage so well as to be able to recite it, Achieved overnight to, expect results overnight; accomplish sth. in one move, under no consideration, Five elements Under all, Five elements And under, be quick at reading, easy as my eye, have a camera eye, be able to recite sth. after reading it over once, Bing Xie Ying edge, problems can be readily solved as a bamboo is split all the way down once it has been chopped open