generated at
-ly
noun + ly = adjective
1 (forming adjectives) having the qualities of: brotherly | rascally.
...のような、...らしい
2 (forming adjectives) recurring at intervals of: hourly | quarterly.
...ごとに(1度)ある(! 「...ごとに」の意の副詞にもなる)

ORIGIN
Old English -lic, of Germanic origin; related to like.

adjective + ly = adverb
forming adverbs from adjectives, chiefly denoting manner or degree: greatly | happily | pointedly.
様態、程度、時を表す
第...番目に(e.g. secondly)

ORIGIN
Old English -līce, of Germanic origin.