The phrase "portion of blame" is correct and commonly used in written English.
It refers to a part or share of responsibility for a situation or problem. Example: "The company's failure was not solely due to the CEO's actions; each department must take their portion of blame for not properly communicating with one another."
Has to take portion of blame for Scotland creating absolutely nothing against a poor Italian side.
And what do the players think of Mourinho absolving himself from even the smallest portion of blame?
Citing the small portion of blame assigned to the firm, she said the company was "pleased that the jury understood how minimal Lehman Brothers' involvement was in any wrongdoing".
Never one not to hold a grudge, Prezza recently attempted to plonk a hefty portion of blame at Reid's door when discussing Labour's failure to strike a post-election deal with the Lib Dems last year.
Sanchez took an unnecessary portion of blame afterward, because while he struggled through the first two quarters, his receivers failed him throughout, dropping passes as if in a driving rainstorm instead of a windy but reasonable afternoon.
"More than 77 per cent of the couples here divorce after assuming some portion of blame, which is in effect no different from no-fault divorce recognised in other countries.
Depending on their political beliefs, economists tend to place varying portions of blame for this on a rise in single-parent families, a withering of good jobs for people without college degrees and a shift away from anti-poverty programs by the federal government.
"Yes, the opposition must share their portion of the blame," said Yasser el-Shimy, Egypt analyst for the Crisis Group.
But even the most extreme rendering of any alleged skullduggery there, or at A.I.G., or at Lehman, or at Bear Stearns, captures just a portion of the blame.
In June, a jury in United States District Court in Manhattan found that Turner bore a substantial portion of the blame for the damage caused by the fire.
And it should also be noted that farmers bear only a portion of the blame for greenhouse gas emissions in the food system.
