Which preposition to use with stouter

than Occurrences 15%

handicappedhis man was much stouter than any of the othersand the race, by rights, should have been run again.

of Occurrences 3%

Oft, working by her Husband's side, Ruth does what Simon cannot do; 50 For she, with scanty cause for pride, Is stouter of the two.

in Occurrences 1%

If Andrew, in the midst of the gayeties by which he found himself accepted of the Maurices' friends, was never haunted by any thought of all this, his heart had grown stouter in one year's time than twenty years had found and left it previously.

Which preposition to use with  stouter