by chance
US /baɪ tʃæns/
UK /baɪ tʃæns/

1.
secara kebetulan, tidak sengaja
without planning or intention; accidentally
:
•
I met my old friend by chance at the airport.
Saya bertemu rakan lama saya secara kebetulan di lapangan terbang.
•
Did you find that book by chance or were you looking for it?
Adakah anda menemui buku itu secara kebetulan atau anda mencarinya?