Which preposition to use with macerations

in Occurrences 2%

Or by maceration in water for several days, when the hoof will become loosened by the process of decomposition, and may be easily removed by the hands.

of Occurrences 2%

For though in macerations of the flesh, in fasting, and in hour-long prayers he spent his days, this holy man was much troubled by devils.

Which preposition to use with  macerations