The phrase "a plank of a" is not correct and does not convey a clear meaning in written English.
It may be intended to describe a specific type of plank or a part of something, but without additional context, it is unclear when to use it.
Example: "He used a plank of a tree to build the fence."
Alternatives: "a piece of a" or "a section of a".
You might as well use a spoon to cut a plank of wood.
He used a plank of wood, which friends call a "Mac plank," to get from his wheelchair to his car.
Her bed will be a plank of oak with a chunk of rose quartz for a pillow.
A chimp or a plank of wood would have exactly the same chance of winning as a sentient human being.
Beth Gibbons remains the Sylvia Plath of electronic music, clinging to the mic stand with both hands like a drowning woman to a plank of wood during a wracked Sour Times and transcendent Wandering Star, neither of which sounded remotely dated.
A machine might be able to tell the difference between a ship and a tank, but it may well struggle to tell the difference between a tank and a civilian lorry with a plank of wood sticking out of it".
Though he nominally supported a public option as a plank of health care reform, it was not a high priority and he rarely mentioned it, according to a review of his campaign speeches, interviews and debates by Sam Stein of The Huffington Post.
There's also the Diddley Bow – a single string and an old sweetcorn can attached to a plank of two-by-four – and a cigar-box guitar that he'll be dusting off on his next tour.
Three days later, just after 6 a.m. on a Sunday, thieves drove across the fields behind the house in a Mitsubishi S.U.V., then used the car and a plank of wood to smash a window and a steel shutter.
While I was putting it together with my weak female hands, the landlord barged in, grabbed a plank of wood from me, and said "a woman shouldn't be doing this kind of work".
