Very frequently the metrical accent does not coincide with the syllabic accent: the musical accent will fall on an unaccented syllable, or vice versa.
"Style in Singing"
W. E. Haslam
The unaccented syllables were also not counted.
"The Literature of Ecstasy"
Albert Mordell
These songs are made up of lines of from two to five syllables, of which one to four are unaccented, the poet being bound by no definite numbers.
"The Literature of Ecstasy"
Albert Mordell