different between upkeep vs idling

English

up +? keep

upkeep (usually uncountable, plural upkeeps)

Maintenance; the act or effort of keeping something in good and working condition.
I would enjoy having a swimming pool, but I don't want to deal with the upkeep.
- […] it was unnecessary to fence off pasture from arable land, which saved a lot of labour on the upkeep of hedges and gates.

upkeep (third-person singular simple present upkeeps, present participle upkeeping, simple past and past participle upkept)

(transitive, Britain) To maintain (something) or keep it in good repair.
Do you know how to upkeep a boat?

idling

idling (countable and uncountable, plural idlings)

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