We look at the division of 7801450 by 870 
The aim is to understand the frequency of 870 in 7801450.

Step 1:
870 can be fit into 7 0 times, resulting in a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 870

Advancing to step 2:
The number 870 fits into 78 0 times, leaving a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 78, we get 78.
Bring next digit (0) of the dividend behind the 78 and repeat the process: 780 / 870

On to step 3:
870 goes into 780 0 times with a remainder of 780.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 780, we get 780.
Append the next digit (1) from the dividend to 780 and continue with: 7801 / 870

Going ahead to step 4:
870 can be fit into 7801 8 times, resulting in a remainder of 841.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Deduct 6960 from 7801 and we're left with 841.
Include the next digit (4) from the dividend after 841, then repeat: 8414 / 870

Moving on to step 5:
If we divide 8414 by 870, we get 9 and a remainder of 584.
The number 9 becomes the next digit in our result. 
Result so far: 89.0
If we subtract 7830 from 8414, we get 584.
Grab the next digit (5) from the dividend, add it to 584, then carry on: 5845 / 870

Let's proceed to step 6:
When dividing 5845 by 870, we get 6 with a remainder of 625.
Put 6 as the next digit of the answer. 
Result so far: 896.0
Subtracting 5220 from 5845 leaves us with 625.
Fetch the next digit (0) from the dividend, attach it to 625 and continue: 6250 / 870

Let's proceed to step 7:
When dividing 6250 by 870, we get 7 with a remainder of 160.
The number 7 becomes the next digit in our result. 
Result so far: 8967.0
The remainder is 160 after subtracting 6090 from 6250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Moving on to step 8:
1600 divided by 870 is 1 with a remainder of 730.
Put 1 as the next digit of the answer. 
Result so far: 8967.1
The remainder is 730 after subtracting 870 from 1600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7300, and continue the process.

Let's proceed to step 9:
The number 870 fits into 7300 8 times, leaving a remainder of 340.
Put 8 as the next digit of the answer. 
Result so far: 8967.18
Subtracting 6960 from 7300 leaves us with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Step 10:
When dividing 3400 by 870, we get 3 with a remainder of 790.
Use 3 as the next digit of our solution. 
Result so far: 8967.183
If we subtract 2610 from 3400, we get 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7900, and continue the process.

Advancing to step 11:
If we divide 7900 by 870, we get 9 and a remainder of 70.
Write down 9 as next digit of the result. 
Result so far: 8967.1839
Deduct 7830 from 7900 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 12:
The number 870 fits into 700 0 times, leaving a remainder of 700.
Use 0 as the next digit of our solution. 
Result so far: 8967.1839
If we take 0 away from 700, we end up with 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

Going ahead to step 13:
The number 870 fits into 7000 8 times, leaving a remainder of 40.
Put 8 as the next digit of the answer. 
Result so far: 8967.183908
If we subtract 6960 from 7000, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 14:
400 divided by 870 is 0 with a remainder of 400.
Use 0 as the next digit of our solution. 
Result so far: 8967.183908
Deduct 0 from 400 and we're left with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Going ahead to step 15:
870 goes into 4000 4 times with a remainder of 520.
The next digit of our result is 4. 
Result so far: 8967.18390804
Subtract 3480 from 4000 to get 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

In conclusion, the division gives 8967.18390804 with a balance of 5.2e-07.