The word Ocurring is misspelled against Occurring, which is present continuous of "Occur"
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Occurring has double "cc" is mispronounced as "c"
Remember double 'CC' in between the strings O & urring which should not be misspelled with single 'C'
Wrong Spelling:  O-c-urring 
Correct Spelling:  O-cc-urring 
Check more misspelled words of Occurring to spell it correct.