Baptisms in Farnham Essex for Frosts, around that time:
20Jan 1805 Mineward son of James and Ann
15 Feb 1807 Benjamin, Susanna and Elizabeth son and dtrs of James and Sarah
21 MAy 1809 Joseph and Elizabeth, son and dtr of James and Sarah
6 Nov 1811 George son of James and Sarah
12 Nov 1813 Charlotte dtr of James and Sarah
24 Feb 1816 James son of Thomas and Mary
10 Aug 1817 Hetty dtr of James and Sarah aged 1 yr and 2 weeks
17 MArch 1818 William son of Thomas and MAry
8 March 1819 William son of William and Sarah
9 July 1820 Sarah dtr of Thomas and Mary
23 Sep1821 Joseph son of William and Sarah
15 Dec 1822 Emma dtr of Thomas and Mary
5 Oct 1823 James son of William and Sarah
17 July 1825 Mary Ann dtr of Thomas and MAry
18 March 1827 Harriet illegitimate dtr of Sarah (widow)
6 June 1827 Eliza dtr of Thomas and MAry
4 March 1829 Ann dtr of thomas and MAry
9 Aug 1827 Sarah illegitimate dtr of Sarah (widow)
5 Aug 1830 Betsy dtr of Thomas and Mary
25 Oct 1830 Ann dtr of Minet and Mary
8 Sept 1835 John son of Thomas and MAry
24 feb 1833 Sarah dtr of Minet and Mary
5 MArch 1835 Mary Ann dtr of Minet and MAry
19 April 1835 Ann illegitimate dtr of Sarah (widow)
19 MArch 1837 Lucy dtr of Mynott and MAry
10 Sept 1837 John son of James and MAry
period looked through 1805- 1839
Hopefully you can piece together some families on the censuses from this, and see who "disappears".