"a priceless time" is correct and usable in written English.
You can use it to refer to a special moment that you may not be able to experience again. For example, "The time I spent with my grandmother before she passed away was a priceless time that I will always cherish."
Not to mention all the love that went into designing each room of the house and the equity built up over the years by our priceless time together as a family.
Mr Lake spent three years organising for President Clinton the procedures by which the foreign and defence policies of a great power are evolved and put into execution: what causes a working group to be brought together, a committee formed or recalled to life, when and how demands may or may not be made on the priceless time of the president.
-PHILIPPE GUDIN Director General, Institut Le Rosey Rolle, Switzerland Time well spent I'm glad I read your gem on the value of time ("Time, priceless time," July 5, p. 250).
Mr. President, the time has come for you to admit that you have wasted priceless time, but it's never too late to change for the better.
Many have lost friends and supporters, strained their relationships, missed out on priceless time with their families and suffered increased anxiety and other negative health effects.
We are also very grateful to extend our appreciation to the study participants (mothers) who share their priceless time, supervisors, and the data collectors for their full commitment and psychological and technical support.
In naming "Disneyland Dream" to the registry, the Library of Congress called it "a priceless and authentic record of time and place".
His wife wishes he could devote more time to a priceless asset, their 2-year-old daughter.
A good wine drunk with friends is a hundred times better than a priceless wine that sits in a cellar".
It's a priceless gift for people in modern times".
