Which preposition to use with proprietress

of Occurrences 16%

"The first witness of real importance was Mrs. Chapman, the proprietress of Russell House, whose original information to the police led to the discovery of Mr. Morton.

in Occurrences 1%

A lady of my acquaintance, who is a proprietress in County Galway, is in the habit of receiving her own rents.

Which preposition to use with  proprietress