- From quinquennial + -ly. (Wiktionary)
“Each of the new Provinces of Alberta and Saskatchewan are to be paid a per capita allowance on a minimum population of 250,000, increasing quinquennially from 1901 until a maximum population of 800,000 souls is attained-twice that in the Maritime Provinces, and but little over one-half of that in Ontario.”
“How rapidly the traffic attracted by the economy in distance thus effected has developed, is best illustrated by the following statement, taken quinquennially from the company's returns:”
“It is hoped that, unlike the earlier edition, it will be subjected to continual updating, if not annually then at least quinquennially.”
These user-created lists contain the word ‘quinquennially’.
five; multiple of five
A long list of adverbs, beginning with full-drive. Someone had to list them. This list in continued in the list More Adverbia.
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