Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
in -frĕquentĭa, ae, f. 
- I.  A small number, thinness, scanliness: summa senatus, Cic. Q. Fr. 3, 2, 2: senatus, Liv. 2, 23, 12: prodita (sc. legionum), the small number of his troops, Tac. A. 15, 10.
- II.  Solitariness, loneliness: locorum, Tac. A. 14, 27.