- [ex 001 "Guests were arriving [p en/at Frequency] a steady clip."]

- [ex 002 "The risk becomes worse [p en/by Frequency] the day."]

- [ex 003 "I see them <u>[p en/on Frequency]\_occasion</u>/<u>[p en/from Frequency]\_time_to_time</u>. [contrast <i>on ... occasion</i>, [exref 004 Time]]"]

- [ex 004 "I see them [pspecial "on\_a\_" en/on_a_basis Frequency--Manner] daily [pspecial "\_basis" en/on_a_basis Frequency--Manner]. ([ss Frequency--Manner]) [cf. [exref 032 Manner]]"]

- [ex 005 "I keep getting the same message [p en/over Frequency] and [p en/over Frequency] again."]

[ss 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:

- [ex 006 "The camcorder failed [p en/for Frequency] the third time. ([ss Frequency])"]

- [ex 007 "I skipped lunch [p en/for Frequency] <u>three days</u>/<u>the third day</u> in<sub>[ss Characteristic--Locus]</sub> a row. ([ss Frequency]) [see [exref 021 Characteristic]]"]

- [ex 008 "We arrived [p en/for Purpose] our (third) visit. ([ss Purpose])"]

Contrast: [ss RateUnit]