Both Uses

gratuitous
in
Ulysses, by James Joyce
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This gratuitous contribution of a humorous character occasioned a fair amount of laughter among his entourage.†
Chpt 16 *
A provisional failure to obtain renewal of an advertisement: to obtain a certain quantity of tea from Thomas Kernan (agent for Pulbrook, Robertson and Co, 5 Dame Street, Dublin, and 2 Mincing Lane, London E. C.): to certify the presence or absence of posterior rectal orifice in the case of Hellenic female divinities: to obtain admission (gratuitous or paid) to the performance of Leah by Mrs Bandmann Palmer at the Gaiety Theatre, 46, 47, 48, 49 South King street.†
Chpt 17

Definitions:

(1) (gratuitous)
unnecessary and unwarranted

or less commonly (except where it is common in the legal field): costing nothing
(2) (meaning too rare to warrant focus)