Fourier just means the big wave is the sum of the little waves with the ability to predict your x-y-z position (like the popularity of keywords) over time. If in a boat with no sail and engine off, as the Sun uses energy, and the incidental shape of land and water bodies, to create pressure zones, partly the result of evaporation of sea water to create clouds and block the Sun later, to create high pressure to move to low pressure, high resolution sensing and mapping predicts your location. The Coriolis Force, the result of the rotation of the Earth, and the shape of the ocean floor and beach are factors too.
Articles must be unique. You can grab articles, paragraphs, etc. from keyword searching for true article writing independent of self-writing. Article spinning, like when you start with your own content, can rotate synonyms, merging with rotation of examples (eg. New York, Los Angeles, etc. for "city" placeholder), reorder words with permutations like middle paragraphs with no chronologic modifiers like "then", "later", "afterwards", etc. The keywords you start with, using Fourier, should be high demand, low competition, trending upward, and niche-y or targeted with many words or long tail keywords for best KEI. Google searching leads to Google News offering the news you are most interested in, then copy keywords to a list and lookup on Google Trends. They will show trendiness scores and related searches and topics you can add for comparing 5 keyword trends at a time. Go back one day, a week, a month, 3 months (fiscal quarter), one year, and 2010 for Google Trends epoch. "Breakout" is 5,000% where they max-out, everything else is lower. Divide each trendiness score by the number of days (one day to back to 2010) for importance score, and average out. Use the keywords that have the highest adjusted KEI (AKEI), or:
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