More generic `generic.stats` - Allow 3H inputs #5122

Job	Run time
Black (Python3.8)	1m 4s
test-py38-coverage-eofs (Python3.8)	10m 31s
test-conda-py310 (Python3.10)	11m 47s
test-${{ matrix.tox-env }} (Python${{ matrix.python-version }})	0s
test-py39-coverage-sbck-eofs (Python3.9)	8m 4s
test-py310-coverage (Python3.10)	11m 28s
test-py311-coverage-sbck (Python3.11)	9m 39s
test-notebooks_doctests (Python3.10)	9m 36s
test-offline-prefetch (Python3.11)	5m 18s
finish	15s
	1h 7m 42s

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