From BiblePortal Wikipedia

King James Dictionary [1]

FRANK'LY, adv.

1. Openly freely ingenuously without reserve, constraint or disguise as, to confess one's faults frankly. 2. Liberally freely readily.  Luke 7 .

Vine's Expository Dictionary of NT Words [2]

 Luke 7:42

Webster's Dictionary [3]

(adv.) In a frank manner; freely.

International Standard Bible Encyclopedia [4]

fraṇk´li ( χαρίζομαι , charı́zomai ): "Frankly" in the sense of "freely," "readily," "graciously," occurs only in the translation of charizomai , properly "to gratify," "to do that which is grateful or pleasing," "to forgive" ( Luke 7:42 , "He frankly forgave them both," the Revised Version (British and American) has simply "forgave"; the same word is translated in  Luke 7:43 , the King James Version and the Revised Version (British and American), "forgave," in  Luke 7:21 the King James Version it is "gave," the Revised Version (British and American) "bestowed," granted to see). It occurs in the New Testament only in Luke and Paul.