From November to March it runs every 15 minutes.
From April to October it runs every 10 minutes.
You can buy a ticket for the Prague public transport:
Basic ticket for 30 mins: 24 CZK
Wikipedia https://zh.wikipedia.org/wiki/佩特任缆车
Official website of Prague Transport http://www.dpp.cz/en/the-petrin-funicular/
地址 Újezd, 110 00 Prague, Czech Republic
坐标 50°4'56.213" N 14°23'57.183" E