See also the following links:

▎ENGLISH

Decomposition of Time Series (Wikipedia)
▸ https://en.wikipedia.org/wiki/Decomposition_of_time_series

Decomposing Time Series Data
▸ https://towardsdatascience.com/time-series-from-scratch-decomposing-time-series-data-7b7ad0c30fe7

Decomposition in Time Series Data
▸ https://medium.com/analytics-vidhya/decomposition-in-time-series-data-b20764946d63

▎日 本 語

時系列分解分析のビジュアルガイド
▸ https://ichi.pro/toki-keiretsu-bunkai-bunseki-no-bijuarugaido-177327048345904

時系列を基本要素に分解する
▸ https://gri.jp/media/entry/333