This is the 62nd most frequent Czech word.
měla
"měla" = "she had"
Here, 'měla' is used to denote an obligation or expectation in the past.
Měla to udělat včera.
She should have done it yesterday.
In this sentence, 'měla' implies possession or association in the past.
Včera měla narozeniny.
Yesterday was her birthday.
Here, 'měla' expresses possession of an abstract concept, in this case, 'pravdu' (truth).