tough time of it

have a tough time (of it) AND have a rough time (of it) (to experience a time of stress or bad luck; to experience a difficult period) — переживать тяжелые времена, испытывать трудные времена
give someone a rough /tough time (to treat someone severely or to cause difficulties for them)

Example 1: Detective Inspector Frank Elder has had a tough time of it lately. He's recently retired from the police force following the abduction, rape and near murder of his daughter Katherine.

Example 2: After the divorce he had a rough time of it. — После развода ей пришлось нелегко; ей туго пришлось.

Example 3: She's had a rough time of it in prison.
— В тюрьме ей многое пришлось пережить.

Since his wife died, Mr. Brown has been having a rough time of it. (McGraw-Hill Dictionary of American Idioms and Phrasal Verbs)
Be nice to Bob. He's been having a rough time at work. (McGraw-Hill Dictionary of American Idioms and Phrasal Verbs)

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see also
[dry spell]
[bad patch]
[down on one's luck]
[бутерброд всегда падает маслом вниз]
[черная полоса]
[не везет так не везет]
[Hard lines!]
opp.
[полоса везения]