This is the 663rd most frequent Chinese word.
十九
"十九" means "nineteen" in English.
Here, '十九' is used to express an age, specifically the number nineteen.
我十九岁。
I am nineteen years old.
In this sentence, '十九' indicates a specific numerical value for the cost in yuan.
商场的这个商品售价是十九元。
The price of this item in the mall is nineteen yuan.
The term '十九' here refers to an ordinal number, signifying the nineteenth in a series, in this case, centuries.