on which occasion

adverb

Roget 119: at that time, at which time, at that moment, at that instant; then, on that occasion, upon; not now, some other time.    when; whenever, whensoever; upon which, on which occasion; at another time, at a different time, at some other time, at any time; at various times; some one of these days, one of these days, one fine morning; eventually, some day, by and by, sooner or later; some time or other; once upon a time.    ... show more

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