Intervala or Intervalla: How To spell?

The word Intervala is misspelled against Intervalla, which is plural of "Intervallum"

Intervalla has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings interva & a which should not be misspelled with single 'L'
Wrong Spelling:  interva-l-a 
Correct Spelling:  interva-ll-a 
Explore spell check of Intervalla to spell without errors.