Words to Describe intermittence

How intermittence often is described ("________ intermittence")

• regular
• such
• partial
• inevitable
• proustian
• same
• glomerular
• characteristic
• cardiac
• corresponding
• baffling
• mysterious
• par
• constant
• probable
• critical
• mere
• periodic
• considerable
• frequent
• true
• occasional
• long
• feeble
• marked
• unnoticed