This is the 2853rd most frequent Russian word.
ангела
"Angel" (genitive singular or accusative plural form).
Here, 'ангела' is in the genitive case to indicate possession or association.
Я видел изваяние ангела в парке.
I saw a sculpture of an angel in the park.
In this sentence, 'ангела' is also in the genitive case, used metaphorically to describe patience.
Он вел себя с терпением ангела.
He behaved with the patience of an angel.
The word 'ангела' here is again in the genitive case, showing what the figurine represents.