sparingly

sparing +‎ -ly

sparingly (comparative more sparingly, superlative most sparingly)

1. In a sparing manner; with frugality, moderation, scantiness, reserve, forbearance, or the like; sparsely.
   • 2008, Kalani, All about Hand Percussion: Everything You Need to Know to Start Playing Now!, Alfred Publishing Co., Inc., →ISBN, page 24:

     The Mark Tree is generally used as an effect to accentuate transitions in music, either at the beginning or end of a phrase. When used sparingly, they ^[sic] can add an exotic "shimmer" effect.

• “sparingly”, in The Century Dictionary […], New York, N.Y.: The Century Co., 1911, →OCLC.

• raspingly