To complete the number of syllables in a pentameter Shakespeare (and other contemporaries) let multiple actors say a verse, like shown in Macbeth
Were two actors complete a pentameter:
DUNCAN: As seemeth by his plight, of the revolt
The newest state
MALCOLM: This is the seargent
Who like a good and hardy soldier fought
Or sometimes three actors:
ROSS: The victory fell on us
DUNCAN: Great happiness!
ROSS: That now
Sweno, the Norway's king, craves composition
I was wondering if anyone knew how this technique is called. Also, I know there's a practical reason for doing this but would there also be a stylistic one?. Source any stylistic motives please.