different between dallying vs dalliance

English

dallying

dallying (plural dallyings)

dalliance
- 1902, J. M. Barrie, s:The Little White Bird
  Nevertheless, you must know (if I am to speak honestly to you) that I do not repent me those dallyings in enchanted fields.

From Middle English daliaunce et al., from dalien (“to exchange pleasantries, to chat; to flirt”), from Old French dalier, dailer.

dalliance (countable and uncountable, plural dalliances)

Playful flirtation; amorous play. [from 14th c.]
Synonym: flirtation
A wasting of time in idleness or trifles. [from 16th c.]
Synonyms: dawdling, idling, trifling
A sexual relationship, not serious but often illicit.
Synonym: affair

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