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Keyword density
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<h2 id="see-also">See also</h2> <ul><li><a href="/facts/Online_advertising/Ncsv0GRz">Online advertising</a></li></ul> <h2 id="external-links">External links</h2> <ul><li><a href="https://hellotools.org/en/check-keywords-and-repetitions-of-a-website-online">Keyword density checker</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Taniar, David; Gervasi, Osvaldo; Murgante, Beniamino; Apduhan, Bernady O.; Pardede, Eric (2010-03-16). Computational Science and Its Applications - ICCSA 2010: International Conference, Fukuoka, Japan, March 23-26, 2010, Proceedings. Springer Science & Business Media. p. 212. ISBN 9783642121883. (Nkr * Nwp / Tkn) * 100. <a href="9783642121883" target="_blank">9783642121883</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> </ol>