what is the total number of years that frederik beichmann was a deputy judge?
10
col : nationality | name | term as a deputy judge | reason for termination row 1 : norway | frederik beichmann | 30 january 1920 — 6 december 1930 | not re-elected row 2 : china | wang ch'ung-hui | 30 january 1920 — 6 december 1930 | not re-elected row 3 : finland | rafael erich | 15 january 1931 — 1 february 1936 | post abolished row 4 : portugal | jose caeiro da matta | 15 january 1931 — 1 february 1936 | post abolished row 5 : romania | demetre negulesco | 30 january 1920 — 6 december 1930 | not re-elected row 6 : yugoslavia | mileta novaković | 15 january 1931 — 1 february 1936 | post abolished row 7 : austria | josef redlich | 15 january 1931 — 1 february 1936 | post abolished row 8 : yugoslavia | mihajlo jovanović | 30 january 1920 — 6 december 1930 | not re-elected
what is the total number of years that frederik beichmann was a deputy judge?
Nationality Name Term as a Deputy Judge Reason for termination
Norway Frederik Beichmann 30 January 1920 — 6 December 1930 Not re-elected
China Wang Ch'ung-hui 30 January 1920 — 6 December 1930 Not re-elected
Finland Rafael Erich 15 January 1931 — 1 February 1936 Post abolished
Portugal Jose Caeiro da Matta 15 January 1931 — 1 February 1936 Post abolished
Romania Demetre Negulesco 30 January 1920 — 6 December 1930 Not re-elected
Yugoslavia Mileta Novaković 15 January 1931 — 1 February 1936 Post abolished
Austria Josef Redlich 15 January 1931 — 1 February 1936 Post abolished
Yugoslavia Mihajlo Jovanović 30 January 1920 — 6 December 1930 Not re-elected
10