The OICS website says: "We visit most prisons at least four times each year, and the higher risk prisons and Banksia Hill Detention Centre at least six times a year." The 2024-25 annual report says: "We visit most facilities at least three times per year, and higher risk locations at least five times." Its own table of 2024-25 liaison visits shows ten prisons received three visits or fewer, and Wandoo and Boronia two each (calc). The same report gives 80 liaison visits in one place and 78 in another.
Sources: OICS, What we do (oics.wa.gov.au, updated 28 August 2026); OICS Annual Report 2024-25 pp 13, 51.