different between ditty vs doggerelbr

English

From Middle English dite, ditee, from Old French ditie or dité, from ditier, from Latin dict?re (participle dictatus).

ditty (plural ditties)

A short verse or tune.
- 1636, George Sandys, Paraphrase upon the Psalms and Hymns dispersed throughout the Old and New Testaments
  And to the warbling lute soft ditties sing.
A saying or utterance, especially one that is short and frequently repeated.

ditty (third-person singular simple present ditties, present participle dittying, simple past and past participle dittied)

To sing; to warble a little tune.
- Beasts fain would sing; birds ditty to their notes.

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