OPPORTUNELY
opportunely
(adverb) at an opportune time; “he arrived rather opportunely just when we needed a new butler”
Source: WordNet® 3.1
Etymology
Adverb
opportunely (comparative more opportunely, superlative most opportunely)
In a manner suitable for some particular purpose.
In a manner convenient or advantageous at some particular time.
Source: Wiktionary
OPPORTUNE
Op`por*tune", a. Etym: [F. opporiun, L. opportunus, lit., at or
before the port; ob (see Ob-) + a derivative of portus port, harbor.
See Port harbor.]
Definition: Convenient; ready; hence, seasonable; timely. Milton.
This is most opportune to our need. Shak.
– Op`por*tune"ly, adv.
– Op`por*tune"ness, n.
Op`por*tune", v. t.
Definition: To suit. [Obs.] Dr. Clerke(1637).
Source: Webster’s Unabridged Dictionary 1913 Edition