The Swedish term "stegvis minskning" matches the English term "decrement"

other swedish words that include "stegvis" : english :
trappa upp, öka stegvis escalate
utökning, stegvis ökning increment
other swedish words that include "minskning" : english :
fartminskning deceleration
minskning diminution
inskränkning, minskning, förminskning reduction