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plural intervenings
intervention; mediation examples
That intervenes or mediates. examples
Falling between two periods or events. quotations examples
This is not to criticise Ghosh's use of such lexis, but just to point out that Ghosh's use of such lexis must be regarded as examples of re-use and not as evidence of continued use over the intervening period.
2018, James Lambert, “Anglo-Indian slang in dictionaries on historical principles”, in World Englishes, volume 37, page 256
present participle and gerund of intervene examples