different between cerebration vs cerebation

English

From Latin cerebrum (“brain”) + -ation.

cerebration (countable and uncountable, plural cerebrations)

The act of cerebrating; thinking, reflection, thought.
- 1902, William James, The Varieties of Religious Experience, Folio Society 2008, p. 177:
  Dr Carpenter first, unless I am mistaken, introduced the term ‘unconscious cerebration’, which has since then been a popular phrase of explanation.

Presumably a variant of cerebration, from Latin cerebrum, "brain", + -ation.

cerebation (plural cerebations)

The act of using the mind; thought.
- 1875, Edward Heneage Dering, Sherborne; or, The House at the Four Ways, Smith, Elder & Co. (1875), page 284:
  What he said, when he did speak, (whether accidentally, or through unconscious cerebation, who shall say?) was just what he would have been likely to feel under the circumstance.

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