The phrase "a second pillar of" is correct and usable in written English.
It can be used to refer to an additional foundational element or principle that supports a larger concept or structure.
Example: "Sustainability is a second pillar of our corporate strategy, alongside innovation."
Alternatives: "an additional foundation of" or "a supplementary element of".
In officially embracing hybrid warfare, the Pentagon would be replacing a second pillar of long-term planning.
In addition, the growth that some are now calling for has been a second pillar of our policy alongside solid finances".
The crisis is "above all a liquidity crunch," Mr. Steinbrück said, explaining why recapitalization would be "a second pillar" of Berlin's strategy.
France is trying to coordinate a second pillar of the European police force in Afghanistan to do training in the countryside for periods of up to 11 months.
A second pillar of America's retirement system — 401 k)'s — is voluntary, although some employers have embraced automatic enrollment for their employees while giving them the right to opt out.
There is a tension between the rules of world order laid down in the UN Charter and the rights articulated in the Universal Declaration of Human Rights, a second pillar of the world order established under US initiative after the second world war.
In a transition or a bridge, you have to know where you are going, and have a second pillar on the other side of the river, and that is just as hard to negotiate".
It is now winning a third pillar of support with its efficient running of the municipalities that it won in two rounds of elections earlier this year.
Add up China's resources and those of Taiwan, Hong Kong and Macau, and you get something monstrously strong, a fourth pillar of the world economy alongside America, Europe and Japan.
To ensure we do not marginalise sport and creative subjects, we believe they must be included as a sixth pillar of the new Ebacc qualification, in addition to the five core subject areas proposed by the government," said Sport and Recreation Alliance chairman, Andy Reed.
Looking forward, security will join those as a third pillar of what people demand from all computing experiences".
