Temporary accommodation for educational institution frequently getting top marks (3,3,2,3)

I believe the answer is:

ten out of ten

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'temporary accommodation for educational institution' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'frequently getting top marks' is the wordplay.
I cannot really understand how this works, but
'frequently' could be 'often' (synonyms) and 'often' is located in the answer.
This may be the basis of the clue (or it may be nonsense).

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I've seen this clue in The Irish Times.

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