Which preposition to use with entresol

of Occurrences 2%

Raymond de Chelles, who came of a family of moderate fortune, lived for the greater part of the year on his father's estates in Burgundy; but he came up every spring to the entresol of the old Marquis's hotel for a two months' study of human nature, applying to the pursuit the discriminating taste and transient ardour that give the finest bloom to pleasure.

to Occurrences 1%

She had a room in the entresol to herself, in Pauline's absence, and here she could in turn sit and dream, or mend and furbish up her clothesa serious matter nowor read the least scrap of printed matter in her way, for books were scarcer than even at Whitehall; and though her 'mail' had safely been forwarded by Mr. Labadie, some jealous censor had abstracted her Bible and Prayer-book.

Which preposition to use with  entresol