All 4 Uses of

coincidence
in
Great Expectations

Still, the coincidence of our being together on the coach, was sufficiently strange to fill me with a dread that some other coincidence might at any moment connect me, in his hearing, with my name.†
p. 243.0 *

coincidence = a situation where things happened at the same time by chance even though it was unlikely

Still, the coincidence of our being together on the coach, was sufficiently strange to fill me with a dread that some other coincidence might at any moment connect me, in his hearing, with my name.†
p. 243.1

"My dear Handel," Herbert would say to me, in all sincerity, if you will believe me, those very words were on my lips, by a strange coincidence."†
p. 292.9

His being my lawyer, and his being the lawyer of your patron is a coincidence.†
p. 381.5

Definitions:

(1) (coincidence)
a situation where two things happened at the same time or in the same way by chance even though it was unlikely

(for example, if two students in the same class met by accident while visiting another country)
(2) (meaning too rare to warrant focus)
meaning too rare to warrant focus:

Much more rarely coincidence can refer to things coinciding (occurring or operating at the same place or time). For example:
- the coincidence of a target and cross hairs
- the coincidence of entangled particles in quantum physics