Table:
text: Coimbatore Junction railway station
Important originating express trains
Important originating express trains
Train_No_ Train_Name Destination Category Frequency
16617/16618 Rameswaram Express Rameswaram Express Weekly
22475/22476 AC Express Bikaner SF Express Weekly
22609/22610 Intercity Express Mangalore SF Express Daily

text: Coimbatore Junction railway station
Important originating express trains
Important originating express trains
Train_No_ Train_Name Destination Category Frequency
11013/11014 Kurla Express Lokmanya Tilak (T) Mumbai Express Daily
12083/12084 Janshatabdi Express Mayiladuthurai Janshatabdi Except Tuesday
12243/12244 Duronto Express Chennai Duronto Except Tuesday
12647/12648 Kongu Express Hazrat Nizamuddin (New Delhi) SF Express Weekly
12671/12672 Nilgiri Express (slip) Chennai SF Express Daily
12673/12674 Cheran Express Chennai SF Express Daily
12675/12676 Kovai Express Chennai SF Express Daily
12679/12680 Intercity Express Chennai SF Express Daily
12681/12682 Chennai Express Chennai SF Express Weekly
12969/12970 Jaipur Express Jaipur SF Express Weekly
16609/16610 Nagercoil Express Nagercoil Express Daily
16611/16612 Tuticorin Express Tuticorin Express Daily
16613/16614 Rajkot Express Rajkot Express Weekly
16615/16616 Chemmozhi Express Mannargudi Express Daily

Question: How many destinations under Coimbatore Junction station have a weekly frequency and are called AC Express?