Which preposition to use with youthfulness

of Occurrences 22%

" This testimony to the youthfulness of his hostess had the effect of stopping her cross-examination.

as Occurrences 1%

But the Arabs of Spain were then in that unstable social condition and in that heyday of impulsive youthfulness as a people, when men are more apt to be excited and attracted by the prospect of bold adventures than discouraged by reverses.

at Occurrences 1%

Dolce particularly emphasises his youthfulness at the time, calling him un giovanetto, a phrase he twice applies to him in the next paragraph, when he is describing the famous altar-piece of the 'Assunta,' the commission for which, as we know from other sources, was given in 1516.

against Occurrences 1%

Jo Hertz, in one of those pinch-waist belted suits and a trench coat and a little green hat, walking up Michigan Avenue of a bright winter's afternoon, trying to take the curb with a jaunty youthfulness against which every one of his fat-encased muscles rebelled, was a sight for mirth or pity, depending on one's vision.

in Occurrences 1%

He had married in the interval, and as if to keep up his surprising youthfulness in all relations, he had taken a wife considerably older than himself.

to Occurrences 1%

There is no doubt that men of sixty have experienced a decided gain in strength and health by beginning gymnastic exercises even at that age, as Socrates learned to dance at seventy; and if they have practised similar exercises all their lives, so much is added to their chance of preserving physical youthfulness to the last.

beside Occurrences 1%

Since your departure I no more feel your youthfulness beside me, which gave me back my twenty summers.

Which preposition to use with  youthfulness