What is the name of the old movie where the wife gets hiccups and decides she unhappy in her marriage she falls in love with a weird pianist and leaves her husband then regrets it keeks?

The movie you're referring to is likely "The Seven Year Itch," in which a woman named Mary falls for a charming stranger while her husband is away. However, the plot you described closely resembles "The Hiccup Cure," a lesser-known film where a woman experiences hiccups that lead her to reevaluate her marriage. If you're looking for a classic film with themes of marital discontent and longing, "The Seven Year Itch" is a more iconic example.