Which preposition to use with inflexion

of Occurrences 16%

There was no accent definite enough to be called foreign, certainly not to be assigned to any particular race, but there was an exotic touch about his manner of speech suggesting that, even if not that of a foreigner, it was shaped and colored by the inflexions of foreign tongues.

in Occurrences 1%

" "Oh, I am the man, am?" put in Hank, with no very gratified inflexion in his voice; "and what if I am caught?

to Occurrences 1%

"We almost uniformly confine the inflexion to the last or the latter noun.

Which preposition to use with  inflexion