# incidence

> English word · Noun · IPA /ˈɪn.sɪ.dəns/ · frequency rank #12,258

## Definitions
1. The act of something happening; occurrence.
2. The extent or the relative frequency of something happening.
3. The manner of falling; bearing or onus, as of a tax that falls unequally.
4. The striking of radiation or a projectile upon a surface.
5. A measure of the rate of new occurrence of a given medical condition in a population within a specified period of time.
6. The falling of a point on a line, or a line on a plane.
7. The relation between an edge of a graph and one of the vertices it connects.

## Etymology
From Middle French incidence, from Medieval Latin incidentia (“a falling upon”), from Latin incidens, present participle of incidere (“to fall upon”), from in (“on”) + cadere (“to fall”).

## Easily confused with
- **incident** (https://plainspell.com/en/vs/incidence-vs-incident)
- **incidents** (https://plainspell.com/en/vs/incidence-vs-incidents)

## Common misspellings (14)
`icnidence`, `inccidence`, `incdience`, `incidance`, `inciddence`, `incidecne`, `incidencce`, `incidenec`, `incidennce`, `incidnece`, `inciednce`, `inicdence`, `inncidence`, `nicidence`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/incidence