We look at the division of 51181770 by 698 
The aim is to understand the frequency of 698 in 51181770.

Advancing to step 1:
When dividing 5 by 698, we get 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 698

Step 2:
If we divide 51 by 698, we get 0 and a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Bring next digit (1) of the dividend behind the 51 and repeat the process: 511 / 698

Moving on to step 3:
698 goes into 511 0 times with a remainder of 511.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 511, we get 511.
Include the next digit (8) from the dividend after 511, then repeat: 5118 / 698

Let's proceed to step 4:
If we divide 5118 by 698, we get 7 and a remainder of 232.
The next digit of our result is 7. 
Result so far: 7.0
If we subtract 4886 from 5118, we get 232.
Take the next digit (1) from the dividend and append it to 232, then repeat: 2321 / 698

On to step 5:
698 goes into 2321 3 times with a remainder of 227.
Write down 3 as next digit of the result. 
Result so far: 73.0
Subtract 2094 from 2321 to get 227.
Fetch the next digit (7) from the dividend, attach it to 227 and continue: 2277 / 698

Moving on to step 6:
When dividing 2277 by 698, we get 3 with a remainder of 183.
The next digit of our result is 3. 
Result so far: 733.0
If we take 2094 away from 2277, we end up with 183.
Append the next digit (7) from the dividend to 183 and continue with: 1837 / 698

On to step 7:
When dividing 1837 by 698, we get 2 with a remainder of 441.
The next digit of our result is 2. 
Result so far: 7332.0
Subtracting 1396 from 1837 leaves us with 441.
Take the next digit (0) from the dividend and append it to 441, then repeat: 4410 / 698

On to step 8:
698 goes into 4410 6 times with a remainder of 222.
Write down 6 as next digit of the result. 
Result so far: 73326.0
Subtracting 4188 from 4410 leaves us with 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

On to step 9:
698 goes into 2220 3 times with a remainder of 126.
Use 3 as the next digit of our solution. 
Result so far: 73326.3
If we subtract 2094 from 2220, we get 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Let's proceed to step 10:
698 can be fit into 1260 1 times, resulting in a remainder of 562.
Put 1 as the next digit of the answer. 
Result so far: 73326.31
If we take 698 away from 1260, we end up with 562.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5620, and continue the process.

Advancing to step 11:
698 can be fit into 5620 8 times, resulting in a remainder of 36.
Use 8 as the next digit of our solution. 
Result so far: 73326.318
If we subtract 5584 from 5620, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 12:
698 goes into 360 0 times with a remainder of 360.
Use 0 as the next digit of our solution. 
Result so far: 73326.318
If we take 0 away from 360, we end up with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Going ahead to step 13:
The number 698 fits into 3600 5 times, leaving a remainder of 110.
Write down 5 as next digit of the result. 
Result so far: 73326.31805
Subtract 3490 from 3600 to get 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Let's proceed to step 14:
If we divide 1100 by 698, we get 1 and a remainder of 402.
Use 1 as the next digit of our solution. 
Result so far: 73326.318051
If we take 698 away from 1100, we end up with 402.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

Going ahead to step 15:
When dividing 4020 by 698, we get 5 with a remainder of 530.
Use 5 as the next digit of our solution. 
Result so far: 73326.3180515
Subtract 3490 from 4020 to get 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5300, and continue the process.

Step 16:
The number 698 fits into 5300 7 times, leaving a remainder of 414.
Put 7 as the next digit of the answer. 
Result so far: 73326.31805157
Subtract 4886 from 5300 to get 414.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4140, and continue the process.

After the division, we end up with 73326.31805157 and a remainder of 4.14e-07.