The Collaborative International Dictionary of English v.0.48:

Docibility \Doc`i*bil"i*ty\, Docibleness \Doc"i*ble*ness\, n.
   [L. docibilitas.]
   Aptness for being taught; teachableness; docility.
   [1913 Webster]

         To persons of docibility, the real character may be
         easily taught in a few days. --Boyle.
   [1913 Webster]

         The docibleness of dogs in general.      --Walton.
   [1913 Webster]