"Occurence" is a misspelling of "occurrence," which is a noun that refers to the act or instance of something happening or taking place. It signifies an event, incident, or phenomenon that occurs at a particular time or in a specific location.

"Occurrence" can also encompass the fact of something existing, such as the occurrence of a medical condition in a patient. For instance, a doctor can discover the occurrence of stomach cancer in a patient. The stomach cancer did not start occurring when the doctor discovered it but at an earlier point in time. Therefore, the doctor simply discovered the existence of the stomach cancer, regardless of the time it started happening and spreading.  

"Occurrence" can be difficult to spell because it has two pairs of repeating consecutive letters, which include the letters "c" and "r". Much like commonly misspelled words like "tomorrow" and "committee," repeated letters can confuse even native speakers when they trying to spell such words.

Example sentences

  1. The occurrence of the solar eclipse drew crowds of eager spectators.
  2. The unusual occurrence of snow in April surprised everyone in the city.
  3. The frequent occurrences of power outages during the storm left residents without electricity for days.
  4. The scientist studied the occurrence of earthquakes in the region over the past century.
  5. The sudden occurrence of a rainbow after the rain brought smiles to the faces of onlookers.
  6. The occurrence of a rare bird species in the local park excited birdwatchers.
  7. The occurrence of the flu outbreak prompted health officials to take immediate action.
  8. The occurrence of the meteor shower was a breathtaking sight in the night sky.
  9. The recurring occurrence of traffic jams on the highway frustrated commuters.
  10. The mysterious occurrence of crop circles in the farmer's field puzzled investigators.

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Reference:

occurrence
1. something that happens: 2. the fact of something existing, or how much of…
definition in the Cambridge English Dictionary
Definition of OCCURRENCE
something that occurs; the action or fact of happening or occurring —often used with of… See the full definition
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