"long presence" is a correct and usable phrase in written English.
You can use it to describe a person or thing that has been in a specific place for a considerable length of time. For example, "The statue of King Julius has had a long presence in the city square."
But he also disarms people by poking fun at his long presence on the national stage.
But he traced the motivation to Kmart's long presence on the American retail scene.
The company says that its long presence enables it to negotiate better prices with hotels.
Mr. Doré, 71, is something of an unknown as well, despite a long presence on Guinea's political scene.
The extent of animal life in Italy has been much reduced by the long presence of human beings.
Recently, however, both countries have shown signs of fatigue over the long presence of Afghan refugees on their territory and increased pressure for Afghans to return.
MoveOn.org's ad is a brief against a decades-long presence in Iraq, not against serving in the military no matter what.
Armani, Giorgio Visited Beijing with a special event, "One Night Only in Beijing," to celebrate his decade-long presence in China.
The United Nations ended its decade-long presence in Bosnia with the new year, handing over its police mission to the European Union, a first for that bloc's joint security police.
A million Lebanese people (around a third of the population) took to the streets of the capital, Beirut, to protest at the 29-year-long presence of Syrian troops on their soil.
Last season, a ski-in/ski-out Starbucks opened at Squaw Valley, California, and for 2012/13 the mobile champagne bar which popped up in Aspen in the spring is to have a season-long presence.
