different between holloing vs hollowing

English

holloing

holloing (plural holloings)

hollowing

hollowing (plural hollowings)

The act of one who hollows; a cry or shout.
- 1819, Johann Ludwig Burckhardt, Travels in Nubia
  At length, about three o'clock in the morning, we heard the distant hollowings of our watermen, and soon after refreshed ourselves with copious draughts of the delicious water of the Nile.

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