Pekudei 5779

Pekudei is a form of counting, why does the Torah use פקידה rather than ספירה? Ktav V'Hakabala, Ramban on the difference between לפקוד and לספור.

Does the Mishkan represent the sum total of all forms of work to the point that when we need a model for the issur melacha we look to the Mishkan?

Why does the phrase "כאשר צוה ה' את משה" appear so many times in Pekudei (18)? What is the connection between the 18 appearances in the parsha and the 18 brachot of shemoneh esrei?