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Webster 1913 Edition

Noun.

[From

Unsteadiness; levity; lightness.

[Obs.]

Bp. Hopkins.

Noun.

[from flit.] Unsteadiness; levity; lightness.

flittiness ‎(uncountable)

(obsolete, rare) The quality of being flitty; unsteadiness.
- Bishop Ezekiel Hopkins
  […] had we but the same delight in heavenly objects, did we but receive the truth in the love of it, and mingle it with faith in the hearing, this would fix that volatileness and flittiness of our memories, and make every truth as indelible, as it is necessary.