be (only/just) a matter of time
US /biːt əˈraʊnd ðə bʊʃ/
UK /biːt əˈraʊnd ðə bʊʃ/

1.
cuestión de tiempo
used to say that something is certain to happen, although you do not know when
:
•
It's only a matter of time before someone gets hurt if they don't fix that broken step.
Es solo cuestión de tiempo antes de que alguien se lastime si no arreglan ese escalón roto.
•
With their current performance, it's just a matter of time until they win the championship.
Con su rendimiento actual, es solo cuestión de tiempo hasta que ganen el campeonato.