Words similar to one-time-only

Example sentences for: one-time-only

How can you use “one-time-only” in a sentence? Here are some example sentences to help you improve your vocabulary:

"History is offering Sharon a one-time-only chance to record to his credit the political step so needed by his country," it said.
You are not thrilled at the prospect of a new bunch of utility companies calling you at dinner time to offer you their special one-time-only package of cut-rate prices for customers who turn on their air conditioning only after 8 p.m., never run the clothes dryer except between 10 a.m. and noon, and use only fluorescent bulbs?