A documentary about the singer and civil rights activist Marian Anderson, a museum exhibition dedicated to Norman Rockwell’s “The Four Freedoms,” a digital archive dedicated to Walt Whitman and a dictionary of dialects spoken by the Mississippi Band of Choctaw Indians are among the 224 projects across the country to receive new grants from the National Endowment of the Humanities.

The grants, which total $22.2 million, support both individual scholarly projects and large institutional collaborations, all of which, the agency’s chairman, Jon Parrish Peede, said in a statement, “exemplify the spirit of the humanities and their power to educate, enrich and enlighten,” particularly in difficult times.

“When every individual, community and organization in America is feeling the effects of the coronavirus pandemic, it is a joy to be able to announce new projects that will produce vibrant humanities programs and resources for the reopening of our cultural centers and educational institutions,” he said.

The awards, which are part of the agency’s regular cycle of grants, come several weeks after the N.E.H. received $75 million in supplemental funding as part of the $2.2 trillion stimulus package. Mr. Peede has guaranteed that 100 percent of that funding will be distributed directly to grantees, rather than covering the agency’s operational expenses, the agency said.