'long-term existence' is correct and usable in written English.
You can use it to describe something that has been around for a long time or is expected to continue existing over a long period of time. For example, "The organization has been in long-term existence for over 35 years."
The league's long-term existence remains in jeopardy, Ms. Flaherty said.
The letter states: "We, Israelis who worry and care for the well-being of the state of Israel, believe that the long-term existence and security of Israel depends on the long-term existence and security of a Palestinian state.
"We undertook this action because the long-term existence of terrorism here endangers the pillars of Macedonia's multiethnicism".
Foundation executives say the potential switch poses the biggest threat to their long-term existence since 1969, when Congress first made tax exemption contingent on their spending.
Online players argue that the Web sites know that their long-term existence relies on providing a fair game for everyone.
But as they try to stay in business in the short term, they are risking the long-term existence of their fishery.
Therefore the ability of a species to migrate and disperse to new climatic space is critical for its long term existence.
The second jump was of MSV to maize, consistent with the long term existence of the virus in Africa before the arrival of maize in the continent [ 45].
"The nature of digital culture seems to encourage niche-ification but it seems to be harder for a convergence of energy around something that has any kind of long-term, sustained existence," says Reynolds.
Provision of food is associated with long-term, continuous existence of journal clubs [ 4].
These two sub-haplogroups all have a short-distanced and star-like network structure, which indicates a long-term local existence and recent population expansion.
