Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
instancy is a noun meaning "the quickness of action or occurrence". It carries 2 recorded senses.
the quickness of action or occurrence
“the immediacy of their response”
“the instancy of modern communication”
the quality of being insistent
“he pressed his demand with considerable instancy”
archaism
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for instancy come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.