zircon-syenite typically occurs fewer than 0.01 times per million words in modern written English.
zircon-syenite is in frequency band 1, which contains words occurring fewer than 0.001 times per million words in modern written English. More about OED's frequency bands
Frequency data is computed programmatically, and should be regarded as an estimate.
Frequency of zircon-syenite, n., 1810–2010
* Occurrences per million words in written English
Historical frequency series are derived from Google Books Ngrams (version 2), a data set based on the Google Books corpus of several million books printed in English between 1500 and 2010.
The overall frequency for a given word is calculated by summing frequencies for the main form of the word, any plural or inflected forms, and any major spelling variations.
For sets of homographs (distinct entries that share the same word-form, e.g. mole, n.¹, mole, n.², mole, n.³, etc.), we have estimated the frequency of each homograph entry as a fraction of the total Ngrams frequency for the word-form. This may result in inaccuracies.
Smoothing has been applied to series for lower-frequency words, using a moving-average algorithm. This reduces short-term fluctuations, which may be produced by variability in the content of the Google Books corpus.
Decade
Frequency per million words
1810
0.002
1820
0.0022
1830
0.0027
1840
0.0028
1850
0.0028
1860
0.0028
1870
0.0027
1880
0.0027
1890
0.0023
1900
0.0016
1910
0.0013
1920
0.0008
1930
0.0005
1940
0.0003
1950
0.0002
1960
0.0001
1970
0.0001
1980
0.00009
1990
0.00008
2000
0.00008
2010
0.00007
Originally published as part of the entry for zircon, n.