Frequency: The word is one of the 3000 most common words in English.
1.
People or things that are ~ can be trusted to work well or to behave in the way that you want them to.
She was efficient and ~...
Japanese cars are so ~.
ADJ
reliably
It’s been working reliably for years.
ADV
reliability
He’s not at all worried about his car’s reliability.
N-UNCOUNT
2.
Information that is ~ or that is from a ~ source is very likely to be correct.
There is no ~ information about civilian casualties...
ADJ
reliably
Sonia, we are reliably informed, loves her family very much.
ADV
reliability
Both questioned the reliability of recent opinion polls.
N-UNCOUNT