For+a+time
131Time of Useful Consciousness — (TUC) is defined as the amount of time an individual is able to perform flying duties efficiently in an environment of inadequate oxygen supply.cite book |title=Fundamentals Of Aerospace Medicine: Translating Research Into Clinical Applications,… …
132Time immemorial — is a phrase meaning time extending beyond the reach of memory, record, or tradition. The implication is that the subject referred to is, or can be regarded as, indefinitely ancient. The phrase is one of the few cases in the English Language where …
