From a primary elpo (to anticipate, usually with pleasure); expectation (abstractly or concretely) or confidence -- faith, hope.

ἐλπίδα (elpida) − 18 Occurrences

ἐλπίδι (elpidi) − 12 Occurrences

ἐλπίδος (elpidos) − 13 Occurrences

ἐλπὶς (elpis) − 10 Occurrences