From a specified time in the past.

From the time that. / Because. / (obsolete) When or that.

Continuously during that period of time. / At certain points during that period of time.

(mathematics) Ellipsis of sinc function. ( f = sin(x)/x) / (engineering) Ellipsis of sinc function. ( f = sin(pi*x)/(pi*x))

(idiomatic) Long ago; in the (distant) past.

(colloquial, rhetorical question, sarcastic) From what time. / (colloquial, rhetorical question, sarcastic) (as an interrogative interjection) Used to indicate doubt as to the veracity of a statement.

Continuously since.

(duration) Continuously since a specified time or event.

Continuously since a specified time or event.

Since a long time ago.