This friend had decided to concentrate on her career rather than starting a family.

He resigned the next year to concentrate on his writing career.

He gave up the game to concentrate on his career as a law professor.

Retired at the age of 24 to concentrate on his career as a military pilot.

He played for this club in the lower divisions, but concentrated more on his professional career.

She left after one year to concentrate on her musical career.

He dropped out after three years in order to concentrate on his writing career.

By the late 1940s he was concentrating on his composing career.

He left the Army in 1923 to concentrate on his political career.

He did not contest the 1981 general election so as to concentrate on his European career.