All 4 Uses

infirmary
in
One Day in the Life of Ivan Denisovich
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But, he recalled, now they didn't let you lie in bed even in the camp infirmary.†

infirmary = a small facility where patients receive treatment
He invented jobs in and around the infirmary for all the patients who could stand on their feet—fencing the garden, laying paths, bringing soil to the flowerbeds, and, in wintertime, erecting snow barriers.†
As can happen only in camps, Stepan Grigorych had advised Vdovushkin to describe himself as a medical assistant, and had taken him on at the infirmary and taught him to make intravenous injections on ignorant prisoners, to whose innocent minds it could never occur that Vdovushkin wasn't a medical assistant at all.†
How he longed to be in bed in the infirmary, fast asleep!
*

Definitions:

(1) (infirmary)
a small facility where patients receive treatment -- such as a room or two at a school as contrasted to a busy hospital or medical clinic
(2) (meaning too rare to warrant focus)