Asiduities or Assiduities: How To spell?
The word Asiduities is misspelled against Assiduities, which is plural of "Assiduity"
Assiduities has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings a & iduities which should not be misspelled with single 'S'
Wrong Spelling:  a-s-iduities  Correct Spelling:  a-ss-iduities 
Check more misspelled words of Assiduities to spell it correct.