如何从文件linux中找到独特的单词

i have a big file, teh lines look like this Text numbers etc. [Man-(some numers)] is lot of this Man-somenumbers is repeat in few lines, i want to count only unique Mans -words. I cant use unique file , because text before Man words is always different in each line. How can i count only unique Man-somenumbers words in file ?i have a big file, teh lines look like this Tex