That combination is known as Atthai Tap (Aṭṭhāī) — an 8‑day tapasya. Here it is the “mixed” form of Atthai: 5 days Ekāsan, 2 days Tivihār Upvās, and 1 day Chauvihār Upvās. Note:

• Many Śvetāmbara and Digambara traditions accept such mixed patterns as Atthai; some stricter maryādās reserve “Atthai” only for 8 full upvās. Your count is understood as a mixed Atthai, not “8 upvās.”

For short refreshers on terms:

• Tivihār vs Chauvihār basics
• Why 8‑day tapasya (Atthai) is observed