Translation issue: "after" appears at two locations in different usages

[piroor]

The text "after" appears at these two locations:
https://github.com/owncloud/calendar/blob/master/js/app/controllers/valarmcontroller.js#L69
https://github.com/owncloud/calendar/blob/master/templates/part.eventsrepeat.php#L114
Their contexts are different: the first is "N hours after", the second is "after N event(s)". In Japanese they should be translated differently, but I cannot give different translations for them because they share same source text. In other words, the source text "after" is too short. Is it possible to define two different source texts like {time} {unit} after and after {events} event(s)?

Steps to reproduce

1. Visit https://www.transifex.com/owncloud-org/owncloud/translate/#ja_JP/calendar/78138086?q=text%3Aafter and choose the text "after".
2. Try to translate it to match both two occurrences.

Expected behaviour

I can give translation matching to both two occurrences.

Actual behaviour

It is impossible because they appear in different contexts.