“Maranānussati as reciting “jeevitam aniyatan, marana niyatam” or “this life is impermanent, death is a certainty”. While the statement is true, that recitation by itself cannot do much to remove defilements and to purify the mind.”
Recently during a formal session i experimented on contemplating on Anicca, related to an entire journey,dreams while sleeping included.
I.e. your basic definition of Anicca together with “rise & fall”,etc. was patent not only in the long run but also in the short run; i contemplated on my own physiological state,mindstream ,environment, weather and other people’s demeanour.