https://frictionandtoil.guru/ weekly 1.0 https://frictionandtoil.guru/multi-index-problem/ 2026-05-08 monthly 0.9 https://frictionandtoil.guru/citation-graph/ 2026-04-26 monthly 0.9 https://frictionandtoil.guru/cost-of-not-knowing/ 2026-04-25 monthly 0.9 https://frictionandtoil.guru/ai-overview-visibility/ 2026-05-10 monthly 0.8 https://frictionandtoil.guru/how-to-rank-in-chatgpt/ 2026-05-10 monthly 0.8 https://frictionandtoil.guru/perplexity-citation-audit/ 2026-05-10 monthly 0.8