省钱 is a verb-object compound (v.o., 离合词) meaning 'to save money' or 'to be economical'. You can separate the two characters to insert aspect markers (了, 过), duration, or amount between them, e.g. 省了三年钱 ('saved money for three years') or 省了很多钱 ('saved a lot of money'). This pattern is common in everyday conversation when discussing frugality.