loquacity

puheliaisuus talkativeness Talkativeness; the quality of being loquacious.
1887, w:George Bernard Shaw|George Bernard Shaw, An Unsocial Socialist, ch. 17:

Their silence would have been awkward but for the loquacity of Jane, who talked enough for all three.

Here was news for us, for Mr Kelada, with all his loquacity, had never told anyone what his business was.