All 3 Uses

retrospect
in
A Thousand Acres
(Auto-generated)

I looked at her looking at me, and in retrospect, I think that I did feel everything gentle and fun and happy draining away around me.†
p. 136.1

retrospect = to review with hindsight
I don't know why I was surprised to discover everything changed, since it was obvious in retrospect that I had sought to change it.†
p. 172.3
And then our cautious lives had grown intolerable in retrospect, and every possibility of returning to them equally intolerable.†
p. 322.8 *

Definitions:

(1) (retrospect as in: in retrospect, it is clear...)
to review with hindsight (with the understanding that comes after seeing how things turned out)
(2) (meaning too rare to warrant focus)