Doggerel
A limerick is a form of trivial and light-hearted comic verse with a specific rhyming pattern (AABBA) and rhythm.
Light verse.
"Trivial or bad verse" typically refers to poetry that is considered unimportant, unoriginal, lackluster, or poorly crafted. It may lack depth, creativity, or emotional impact, failing to connect with or engage the reader in a meaningful way.
A comic verse is a type of poetry that utilizes humor, wit, and exaggeration to entertain and evoke laughter from the audience. It often employs wordplay, puns, and comedic situations to create a light-hearted and amusing effect.
Limerick
No, the villanelle is not typically considered a form of comic verse. It is a structured poetic form known for its lyricism and repetition of specific lines, often used to explore themes of reflection, love, and loss.
In Shakespeare, verse is usually used by important and serious characters, whereas the less important and comic characters use prose. This is not invariably the case (The play Much Ado About Nothing is almost all in prose) but usual.
Shakespeare had most of his characters speak in blank verse. He went into prose when the characters were of a lower class, or where the character is comic. For example, the Porter in Macbeth speaks in prose, when the rest speak in verse. The witches have a tendency to rhyme as well.
Harold Trevor Baker has written: 'Ben Jonson's Every man in his humour (Act 1. Sc. 4.) tr. into comic Iambic verse'
Diction. The diction of comedy is the common, popular language. The comic poet must endow his personages with his own native idiom, but must endow an alien with the alien idiom.
Just about everybody speaks in unrhymed verse called blank verse. Some minor characters never do, and many characters switch to ordinary prose from time to time, but most of them use blank verse as a rule.
Mungo has written: 'The padlock open'd: or, Mungo's medley. Being a choice collection of the miscellaneous pieces in prose and verse, serious and comic, of Mungo the padlock-keeper of Drury Lane'
The use of blank verse, iambic pentameter, and the portrayal of morally ambiguous characters were elements of Elizabethan tragedy that were not typically found in Greek tragedy.