נֶפֶשׁ nephesh, neh'-fesh; from H5314; properly, a breathing creature, i.e. animal of (abstractly) vitality; used very widely in a literal, accommodated or figurative sense (bodily or mental):—any, appetite, beast, body, breath, creature, × dead(-ly), desire, × (dis-) contented, × fish, ghost, greedy, he, heart(-y), (hath, × jeopardy of) life (× in jeopardy), lust, man, me, mind, mortally, one, own, person, pleasure, (her-, him-, my-, thy-) self, them (your) -selves, slay, soul, tablet, they, thing, (× she) will, × would have it.
KJV Translation Count — Total: 753x
The KJV translates Strong's H5315 in the following manner: soul (475x), life (117x), person (29x), mind (15x), heart (15x), creature (9x), body (8x), himself (8x), yourselves (6x), dead (5x), will (4x), desire (4x), man (3x), themselves (3x), any (3x), appetite (2x), miscellaneous (47x).
נְשָׁמָה nᵉshâmâh, nesh-aw-maw'; from H5395; a puff, i.e. wind, angry or vital breath, divine inspiration, intellect. or (concretely) an animal:—blast, (that) breath(-eth), inspiration, soul, spirit.
KJV Translation Count — Total: 24x
The KJV translates Strong's H5397 in the following manner: breath (17x), blast (3x), spirit (2x), inspiration (1x), souls (1x).
By far nephesh appears more often than neshamah. nephesh is anything that breathes while neshamah is more for human beings. neshamah is the stronger breath of life.
It is important to note that nephesh is translated as soul 475 times, NOT even once as spirit. Only neshamah has spiritual life.