• Guests were arriving at a steady clip. 001

• The risk becomes worse by the day. 002

• I see them on_occasion/from_time_to_time. [contrast on ... occasion, Time#004] 003

• I see them on_a_ daily _basis. (Frequency↝Manner) [cf. Manner#032] 004

• I keep getting the same message over and over again. 005

Frequency is also used when an iteration is specified with an obligatory ordinal number modifier. If the ordinal number is optional, the preposition presumably receives another label:

• The camcorder failed for the third time. (Frequency) 006

• I skipped lunch for three days/the third day in_{Characteristic↝Locus} a row. (Frequency) [see Characteristic#021] 007

• We arrived for our (third) visit. (Purpose) 008

Contrast: RateUnit