The phrase "ago when he stopped" is not correct in written English.
It is an awkward construction that lacks clarity and proper grammatical structure.
Example: "It was a long time ago when he stopped coming to the meetings."
Alternatives: "some time ago when he stopped" or "a while back when he stopped".
Mr. Bowen, who favors making ales and long-forgotten beers, first ventured into home brewing seven years ago, when he stopped into a local supply shop to get a birthday present for a friend and left with $300 of brewing equipment for himself.
"She turned my life around," said Bill Baker, a one-time drug addict and petty criminal, recalling yesterday that his road to personal salvation began one freezing January day a few years ago when he stopped by St. John's for a warming cup of coffee and was approached by Sister Bernadette.
He took up running fifteen years ago when he stopped smoking and running has since become an endorphin-fuelled obsession.
"That said, he is in a better place than where he was three or four weeks ago when he stopped playing.
He started losing appetite few days ago when he stopped eating.
William Emmerson, who was born in Britain, was on his way 14 years ago to Panang, Malaysia, when he stopped off in Los Angeles.
Rafael Trujillo said he was delivering a care package to his son Gerson, who entered the school two days ago, when he was stopped in his tracks by the blast a block away from the school's heavily fortified entrance.
Limbaugh made the news pages sometime ago when he was stopped with a bottle of Viagra as he was returning from the Dominican Republic, with four men to whom he was not married.
Mr. Romagnoli was walking along the trail one day several years ago when he stopped to chat at the site manager's office.
Mr. Ergin, a taxi driver, said he last saw his friend about two weeks ago, when he stopped by the station to fill up on gas.
