What timeframes should be used for these feats?

[RoTt35]

First feat:

Time then lost meaning for her, perception stretching it like taffy as long as she needed. The others had seen her eager and radiant smile, her sparkling eyes, the tilt of her head as she found herself lost in wonderment, encompassing perhaps a fraction of a moment of elapsed objective time. By contrast, Jean could have sworn she was engrossed for hours.

Basically, what would be a "fraction of a moment of elapsed objective time" and what timeframe should be used to calculate the feat?

Second feat:

And with those words, he cast forth into the heart of her the very best of himself, only a fraction of an unmeasurable pulse of time before she struck what remained of his body with such force that it instantly shattered into less than its component atoms.

Same question, which timeframe should be used for a "fraction of an unmeasurable pulse of time"?

 

[RoTt35]

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[RoTt35]

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[RoTt35]

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