単語数

431

3単語フレーズ

キーワード	回数	密度
order schumann resonance	5	3.48%
schumann resonance frequency	4	2.78%
pitch frequency calculator	2	1.39%
fundamental schumann resonance	2	1.39%
solar flare activity	2	1.39%
parkfield arrival heights	2	1.39%
values fundamental schumann	2	1.39%
pkd station parkfield	2	1.39%
arrival heights station	2	1.39%
heights station artarctica	2	1.39%

2単語フレーズ

キーワード	回数	密度
schumann resonance	12	5.57%
order schumann	6	2.78%
pitch frequency	6	2.78%
resonance frequency	5	2.32%
arrival heights	3	1.39%
frequency calculator	3	1.39%
magnetic activity	2	0.93%
electromagnetic waves	2	0.93%
earth surface	2	0.93%
earth ionosphere	2	0.93%

1単語フレーズ

キーワード	回数	密度
frequency	25	5.80%
resonance	14	3.25%
schumann	13	3.02%
earth	9	2.09%
pitch	9	2.09%
hz	8	1.86%
cycles	7	1.62%
station	7	1.62%
calculator	7	1.62%
day	7	1.62%

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