Premodifier: natural
Head noun: frequency

Same concepts
http://dbpedia.org/resource/Natural_frequency

Broader concepts

labelprovenanceconfidence
modal parameterisap:3512885120.800525
vibration characteristicisap:3227549210.744382
toolisap:1487754110.495993
frequencyisap:3542137940.489991

Narrower concepts

labelprovenanceconfidence