76409154 ÷ 870 
The aim is to understand the frequency of 870 in 76409154.

Step 1:
The number 870 fits into 7 0 times, leaving a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (6) from the dividend to 7 and continue with: 76 / 870

Let's proceed to step 2:
870 can be fit into 76 0 times, resulting in a remainder of 76.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 76 leaves us with 76.
Fetch the next digit (4) from the dividend, attach it to 76 and continue: 764 / 870

Advancing to step 3:
764 divided by 870 is 0 with a remainder of 764.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 764 and we're left with 764.
Append the next digit (0) from the dividend to 764 and continue with: 7640 / 870

Moving on to step 4:
870 can be fit into 7640 8 times, resulting in a remainder of 680.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Subtracting 6960 from 7640 leaves us with 680.
Fetch the next digit (9) from the dividend, attach it to 680 and continue: 6809 / 870

On to step 5:
870 can be fit into 6809 7 times, resulting in a remainder of 719.
Use 7 as the next digit of our solution. 
Result so far: 87.0
If we subtract 6090 from 6809, we get 719.
Fetch the next digit (1) from the dividend, attach it to 719 and continue: 7191 / 870

Let's proceed to step 6:
7191 divided by 870 is 8 with a remainder of 231.
The number 8 becomes the next digit in our result. 
Result so far: 878.0
Deduct 6960 from 7191 and we're left with 231.
Grab the next digit (5) from the dividend, add it to 231, then carry on: 2315 / 870

Going ahead to step 7:
870 can be fit into 2315 2 times, resulting in a remainder of 575.
Use 2 as the next digit of our solution. 
Result so far: 8782.0
Subtract 1740 from 2315 to get 575.
Include the next digit (4) from the dividend after 575, then repeat: 5754 / 870

Advancing to step 8:
The number 870 fits into 5754 6 times, leaving a remainder of 534.
Use 6 as the next digit of our solution. 
Result so far: 87826.0
Subtracting 5220 from 5754 leaves us with 534.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5340, and continue the process.

Moving on to step 9:
If we divide 5340 by 870, we get 6 and a remainder of 120.
Write down 6 as next digit of the result. 
Result so far: 87826.6
If we take 5220 away from 5340, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Going ahead to step 10:
870 goes into 1200 1 times with a remainder of 330.
Use 1 as the next digit of our solution. 
Result so far: 87826.61
If we take 870 away from 1200, we end up with 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Advancing to step 11:
If we divide 3300 by 870, we get 3 and a remainder of 690.
Record the quotient 3 as the next digit in the result. 
Result so far: 87826.613
If we subtract 2610 from 3300, we get 690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6900, and continue the process.

Advancing to step 12:
When dividing 6900 by 870, we get 7 with a remainder of 810.
The number 7 becomes the next digit in our result. 
Result so far: 87826.6137
The remainder is 810 after subtracting 6090 from 6900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8100, and continue the process.

Moving on to step 13:
870 goes into 8100 9 times with a remainder of 270.
The next digit of our result is 9. 
Result so far: 87826.61379
If we subtract 7830 from 8100, we get 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Moving on to step 14:
870 goes into 2700 3 times with a remainder of 90.
The next digit of our result is 3. 
Result so far: 87826.613793
The remainder is 90 after subtracting 2610 from 2700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Let's proceed to step 15:
The number 870 fits into 900 1 times, leaving a remainder of 30.
Use 1 as the next digit of our solution. 
Result so far: 87826.6137931
If we subtract 870 from 900, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 16:
If we divide 300 by 870, we get 0 and a remainder of 300.
Use 0 as the next digit of our solution. 
Result so far: 87826.6137931
If we subtract 0 from 300, we get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

The final outcome is 87826.6137931, with a leftover of 3e-07.