What's the difference between pabulation and pabulum?

Pabulation

Definition:

Example Sentences:

(1) Therefore the diagnostic kits were prepared, and the practical application of this procedure for diagnosis of scrub typhus were tested in Shizuoka and Miyazaki Prefectural Pabulic Health Laboratories.

Definition:

(n.) The means of nutriment to animals or plants; food; nourishment; hence, that which feeds or sustains, as fuel for a fire; that upon which the mind or soul is nourished; as, intellectual pabulum.

Example Sentences:

(1) Pabulum-filled speeches have become commonplace, but the reality is more prosaic.
(2) The nuts bring clagginess and the fruit is too wet, so the result is soggy and mushy with a mouth-coating trace of clay, a sort of repulsive pabulum whose problem is not its flavour but its mouthfeel.
(3) Politicians echoing poll-tested pabulum,” Bush said.
(4) This would be empty pabulum, except it was a threat before he tries to hand our schools over to Betsy DeVos , a woman content to leave special needs students at the mercy of inconsistent state laws and a disastrous record of educational privatization which will hurt black children.