6. The monitoring in accordance with paragraph 1, points (a) and (b), shall be carried out at least every six years. The monitoring in accordance with paragraph 1, point (c), concerning, where applicable, the stock of organic carbon in cropland mineral soils and the share of agricultural land with high-diversity landscape features, and paragraph 1, point (f), concerning, where applicable, the standing deadwood, the lying deadwood, the share of forests with uneven-aged structure, the forest connectivity, the stock of organic carbon, the share of forest dominated by native tree species and the tree species diversity, shall be carried out at least every six years, or, where necessary to evaluate the achievement of increasing trends to 2030, within a shorter interval. The monitoring in accordance with paragraph 1, point (c), concerning, where applicable, the grassland butterfly index, paragraph 1, point (d), concerning the common farmland bird index and paragraph 1, point (e) concerning the common forest bird index, and paragraph 1, point (g) concerning pollinator species shall be carried out every year. The monitoring in accordance with paragraph 1, points (h) and (i), shall be carried out at least every six years and shall be coordinated with the reporting cycle under Article 17 of Directive 92/43/EEC and the initial assessment under Article 17 of Directive 2008/56/EC. The monitoring in accordance with paragraph 1, point (j), shall be carried out every three years.