statute of limitations question about New York City real estate contract law

I sold an apartment building in New York City to a developer the terms of the contract are that I would receive title of one apartment at a later date which was not specified. They first have to pay their bank loan before they deliver my apartment. there has been no apparent actionable wrongdoing up to this point and probably not for the whole six years. it has been 4 years and three months to date. I still didn't get my apartment. when does the statute of limitations run out?