Which preposition to use with timist

in Occurrences 1%

During a remarkable wet summer, Joe Vernon, whose vocal taste and humour contributed for many years to the entertainment of the frequenters of Vauxhall Gardens, but who was not quite so good a timist in money matters as in music, meeting an acquaintance who had the misfortune to hold some of his unhonoured paper, was asked by him, not uninterestedly, how the gardens were going on?

Which preposition to use with  timist