The word "perpetuity" is correct and can be used in written English.
You can use it to refer to something that has no end or something that lasts forever. For example, "His love for her lasted a perpetuity."
"That's a lifetime if you're a teenage skater, so it's important to have somewhere else to skate during the construction – and, if necessary, in perpetuity.
"This means we can adopt socially responsible investment criteria without putting at risk the core purpose of GMG's investment funds: to generate long-term returns that guarantee the financial future and editorial independence of the Guardian in perpetuity," he said.
This has ensured that the Group complies with the core purpose of The Scott Trust, GMG's sole shareholder, to secure the financial and editorial independence of the Guardian in perpetuity.
The Scott Trust exists to secure the financial and editorial independence of the Guardian in perpetuity.
GMG delivers the financial security that allows The Scott Trust to achieve its central objective: the editorial independence of the Guardian in perpetuity.
Here's my chance to renew them all in perpetuity.
To that time, the reserve clause — a form of which existed in all four major leagues — kept players shackled to one franchise in perpetuity.
"Innovation of this kind is in the best traditions of the Scott Trust and will help us to fulfil our mission of securing the independence of the Guardian in perpetuity".
The Gates Foundation is meant to live in perpetuity.
In 2008 it was replaced by a limited company with the same core purpose of the original trust: to secure the financial and editorial independence of the Guardian in perpetuity, while its subsidiary aims are to champion its principles and to promote freedom of the press in the UK and elsewhere.
Those shadows are there in perpetuity".
