This is the 4344th most frequent Russian word.
блицкриг
"Блицкриг" (blitzkrieg) is a military strategy meaning "lightning war," characterized by swift, intense attacks to quickly overwhelm the enemy.
Here, 'блицкриг' is used figuratively to describe a rapid and thorough approach to learning a new skill.
Её блицкриг в освоении программирования удивил всех.
Her blitzkrieg in mastering programming surprised everyone.
Here, 'блицкриг' is used metaphorically to describe a quick and decisive effort in a competitive context.
Они задумали настоящий блицкриг, чтобы быстро преодолеть конкуренцию.
They planned a real blitzkrieg to quickly overcome the competition.
In this sentence, 'блицкриг' refers to the historical military strategy involving rapid and intense attacks.