24 Tier 1 v Tier 2 games in the current 20 team format. It's not an exact science but shows a general trend - not much movement in last 4 years.
The 10 teams in the six nations / Rugby Championship are considered Tier 1 - the rest are considered Tier 2 but that’s really more for discussion purposes as only the top 10 teams in the world get regular guaranteed competition against other Tier 1 nations - World Rugby doesn't classify teams as such AFAIK.
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