pick up
Definition: (Concerning business, trade or the economy of a country) to increase or improve after a period of inactivity or decline.
(This phrasal verb has more than one meaning)
E.g.1: Profits were down last year, but in the first quarter of this year it seems that business has picked up.
E.g.2: Sales of the product have picked up in recent weeks.
This phrasal verb cannot be separated.