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