"not seldom" is a correct and usable phrase in written English.
It is used to indicate that something happens more often than one would think. For example: "He visits his old neighborhood not seldom."
Not seldom, you can see that Kerr is having fun.
Petruchio is oft Doug and Katherina is not seldom mindful of the pursed-lipped Mary of years gone by on the screen.
After the emergence of Persian literature, the most important works on literary theory continued to be written in Arabic, though not seldom the authors were Iranians.
He also used the strange jangling color combinations - not seldom laced with black - that were peculiar to himself at that time.
Instead of ensconcing themselves in châteaus, they roamed all over the theatre of war, not seldom taking to the air and covering hundreds of miles in a single day.
The present not seldom re quires us to take a fresh look at the past; and the turbulence of American society over the last several years has unques tionably forced historians to confront points about the Amer ican experience long neglected in our written history and rare ly acknowledged in our national self‐image.
However, the C-V characteristics of such novel MOS structures have not been seldom studied in depth.
And the advice that follows from it protection does not pay is seldom wrong.The argument for free trade is based on the theory of comparative advantage.
"It is not so seldom that neo-Nazis stop in front of the house to be photographed making the Hitler greeting," Harry Buchmayr, a Social Democrat who lives in Braunau, told parliament.
Most yaws cases are presented in children [52]; unlike syphilis, yaws is not venereal, seldom affects mucosa, and does not cause primary chancres [53], [64].
Fibre intake and smoking are not, or seldom, considered when estimating PAFs for breast cancer.
