different between diety vs ditty

Czech

diety

(plural only) per diem (specific amount of money that an organization gives an individual per day to cover living and traveling expenses in connection with work done away from home or on tour)
nominative plural of dieta

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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