a question of time
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a question of time
An inevitability or eventuality; something that is or seems sure to happen at some point in the future. With your reckless spending behavior, it's just a question of time before you go broke.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
only a question of time
orjust a question of time
COMMON If something is only a question of time or just a question of time, it will certainly happen at some time. It was only a question of time before news of the argument leaked out. There are some small groups fighting in parts of the city, but it is just a question of time until order is restored. Note: People sometimes just say that something is a question of time. It's a question of time before his designs are considered classic.
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012