This is the 913th most frequent Chinese word.
辆
A measure word for vehicles.
Here, '辆' functions as a measure word, quantifying '公交车' (buses), showing that there are two.
路上停着两辆公交车。
There are two buses parked on the street.
In this usage, '辆' consistently acts as a measure word preceding '出租车' (taxi), specifying a singular taxi entity.
家门口停了一辆出租车。
A taxi is parked in front of the house.
In this sentence, '辆' is a measure word used before the noun '车' (car) to quantify it, typically indicating that one car is being referred to.