The phrase "a number of columns" is correct and usable in written English.
It can be used when referring to multiple columns in a table, document, or any structured format.
Example: "The report includes a number of columns that display the data for each category."
Alternatives: "several columns" or "multiple columns".
Over the past year, I've written a number of columns that have provoked such allegations, notably when writing about language or why words matter.
Its institutions include the Arutz Sheva news site, for which Mr. Friedman has written a number of columns, and Besheva weekly.
And when you have a number of columns like this, more than four, we call it a Corinthian atrium – a Corinthian atrium with lots of columns.
"I read Tony's book 'I'm Back for More Cash' and found a number of columns that focused on his family," said Lindy DeKoven, co-executive producer of "Listen Up" with Jeff Martin.
The Guardian and The Observer acknowledged the explorer's success, devoting a number of columns to his conquest including praise from Sir Ernest Shackleton and a diary piece about him shaving off his beard.
Microlamination may be continuous for up to 5 mm across a number of columns and botryoids, or discontinuous, with local cross-laminae displaying onlap/offlap relationships relative to underlying laminae (Fig. 1b).
A number of column experiments confirmed Cs retention under different flow rates and inflow solutions.
Step 3: When you have created a number of column and row headings that your group feels are appropriate, transfer the column and row headings to index cards (one heading per card; keep the piles separate).
Analytical estimations are also compared with experimental evidence from a number of column specimens tested under axial load and reversed cyclic lateral drift histories reported in the literature.
In this study, a number of column experiments were conducted to examine the effects of solution pH and anions (carbonate and phosphate) on attachment, transport, and inactivation of two bacteriophages (ϕX174 and MS-2) in goethite-coated sand medium.
We explored a number of column-beam energies and deceleration potentials and found that the best results were obtained with deceleration between −1 and −2 keV and with a gun-accelerating energy of 2.5 keV and higher.
