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