Which preposition to use with superhuman

as Occurrences 3%

"Not that we have been wanting in our duty," he writes, "far from itindeed, we have made efforts almost as superhuman as the story itself appears to be, to get through it; but with the fullest stretch of our perseverance we are forced to confess that we have not been able to struggle beyond the first of the four books...."

in Occurrences 2%

"I'll be an angel boy pretty near all the time," he asserted between mouthfuls of apple, "or most pretty near," he added prudently, as if unwilling to promise anything superhuman in the way of behavior.

to Occurrences 2%

Then I had applied the term superhuman to it, with an almost instinctive knowledge that the creature was something different from the brute-beast.

Which preposition to use with  superhuman